diff --git a/README.md b/README.md
index 4048baf1..fe6a7325 100644
--- a/README.md
+++ b/README.md
@@ -168,6 +168,7 @@ information on what to include when reporting a bug.
 - Added `GLFW_OSMESA_CONTEXT_API` for creating OpenGL contexts with
   [OSMesa](https://www.mesa3d.org/osmesa.html) (#281)
 - Added `GenerateMappings.cmake` script for updating gamepad mappings
+- Deprecated window parameter of clipboard string functions
 - Removed `GLFW_USE_RETINA` compile-time option
 - Removed `GLFW_USE_CHDIR` compile-time option
 - Removed `GLFW_USE_MENUBAR` compile-time option
diff --git a/docs/input.dox b/docs/input.dox
index 318d48d5..89ff9832 100644
--- a/docs/input.dox
+++ b/docs/input.dox
@@ -846,7 +846,7 @@ converted to one, you can retrieve it with @ref glfwGetClipboardString.  See the
 reference documentation for the lifetime of the returned string.
 
 @code
-const char* text = glfwGetClipboardString(window);
+const char* text = glfwGetClipboardString(NULL);
 if (text)
 {
     insert_text(text);
@@ -860,13 +860,9 @@ The contents of the system clipboard can be set to a UTF-8 encoded string with
 @ref glfwSetClipboardString.
 
 @code
-glfwSetClipboardString(window, "A string with words in it");
+glfwSetClipboardString(NULL, "A string with words in it");
 @endcode
 
-The clipboard functions take a window handle argument because some window
-systems require a window to communicate with the system clipboard.  Any valid
-window may be used.
-
 
 @section path_drop Path drop input
 
diff --git a/include/GLFW/glfw3.h b/include/GLFW/glfw3.h
index bd20d9af..fc7d3cb3 100644
--- a/include/GLFW/glfw3.h
+++ b/include/GLFW/glfw3.h
@@ -4655,7 +4655,7 @@ GLFWAPI int glfwGetGamepadState(int jid, GLFWgamepadstate* state);
  *  This function sets the system clipboard to the specified, UTF-8 encoded
  *  string.
  *
- *  @param[in] window The window that will own the clipboard contents.
+ *  @param[in] window Deprecated.  Any valid window or `NULL`.
  *  @param[in] string A UTF-8 encoded string.
  *
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
@@ -4684,7 +4684,7 @@ GLFWAPI void glfwSetClipboardString(GLFWwindow* window, const char* string);
  *  if its contents cannot be converted, `NULL` is returned and a @ref
  *  GLFW_FORMAT_UNAVAILABLE error is generated.
  *
- *  @param[in] window The window that will request the clipboard contents.
+ *  @param[in] window Deprecated.  Any valid window or `NULL`.
  *  @return The contents of the clipboard as a UTF-8 encoded string, or `NULL`
  *  if an [error](@ref error_handling) occurred.
  *
diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index 1ee85bc6..5f2686b2 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -1740,7 +1740,7 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
         updateCursorImage(window);
 }
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+void _glfwPlatformSetClipboardString(const char* string)
 {
     NSArray* types = [NSArray arrayWithObjects:NSStringPboardType, nil];
 
@@ -1750,7 +1750,7 @@ void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
                   forType:NSStringPboardType];
 }
 
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+const char* _glfwPlatformGetClipboardString(void)
 {
     NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
 
diff --git a/src/input.c b/src/input.c
index 7d9ff774..c06715aa 100644
--- a/src/input.c
+++ b/src/input.c
@@ -1099,21 +1099,16 @@ GLFWAPI int glfwGetGamepadState(int jid, GLFWgamepadstate* state)
 
 GLFWAPI void glfwSetClipboardString(GLFWwindow* handle, const char* string)
 {
-    _GLFWwindow* window = (_GLFWwindow*) handle;
-    assert(window != NULL);
     assert(string != NULL);
 
     _GLFW_REQUIRE_INIT();
-    _glfwPlatformSetClipboardString(window, string);
+    _glfwPlatformSetClipboardString(string);
 }
 
 GLFWAPI const char* glfwGetClipboardString(GLFWwindow* handle)
 {
-    _GLFWwindow* window = (_GLFWwindow*) handle;
-    assert(window != NULL);
-
     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
-    return _glfwPlatformGetClipboardString(window);
+    return _glfwPlatformGetClipboardString();
 }
 
 GLFWAPI double glfwGetTime(void)
diff --git a/src/internal.h b/src/internal.h
index 1bfdb859..4c214638 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -647,8 +647,8 @@ void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode);
 void _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp);
 void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp);
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string);
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window);
+void _glfwPlatformSetClipboardString(const char* string);
+const char* _glfwPlatformGetClipboardString(void);
 
 int _glfwPlatformPollJoystick(_GLFWjoystick* js, int mode);
 void _glfwPlatformUpdateGamepadGUID(char* guid);
diff --git a/src/mir_window.c b/src/mir_window.c
index c752cdb4..fa28d0cf 100644
--- a/src/mir_window.c
+++ b/src/mir_window.c
@@ -858,13 +858,13 @@ int _glfwPlatformGetKeyScancode(int key)
     return _glfw.mir.scancodes[key];
 }
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+void _glfwPlatformSetClipboardString(const char* string)
 {
     _glfwInputError(GLFW_PLATFORM_ERROR,
                     "Mir: Unsupported function %s", __PRETTY_FUNCTION__);
 }
 
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+const char* _glfwPlatformGetClipboardString(void)
 {
     _glfwInputError(GLFW_PLATFORM_ERROR,
                     "Mir: Unsupported function %s", __PRETTY_FUNCTION__);
diff --git a/src/null_window.c b/src/null_window.c
index 3cc3905d..11ccb4f4 100644
--- a/src/null_window.c
+++ b/src/null_window.c
@@ -266,11 +266,11 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
 {
 }
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+void _glfwPlatformSetClipboardString(const char* string)
 {
 }
 
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+const char* _glfwPlatformGetClipboardString(void)
 {
     return NULL;
 }
diff --git a/src/win32_window.c b/src/win32_window.c
index 6d3e76cc..564a99ea 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -1796,7 +1796,7 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
         updateCursorImage(window);
 }
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+void _glfwPlatformSetClipboardString(const char* string)
 {
     int characterCount;
     HANDLE object;
@@ -1839,7 +1839,7 @@ void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
     CloseClipboard();
 }
 
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+const char* _glfwPlatformGetClipboardString(void)
 {
     HANDLE object;
     WCHAR* buffer;
diff --git a/src/wl_window.c b/src/wl_window.c
index f0f2637e..264cf379 100644
--- a/src/wl_window.c
+++ b/src/wl_window.c
@@ -1008,14 +1008,14 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
     }
 }
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+void _glfwPlatformSetClipboardString(const char* string)
 {
     // TODO
     _glfwInputError(GLFW_PLATFORM_ERROR,
                     "Wayland: Clipboard setting not implemented yet");
 }
 
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+const char* _glfwPlatformGetClipboardString(void)
 {
     // TODO
     _glfwInputError(GLFW_PLATFORM_ERROR,
diff --git a/src/x11_window.c b/src/x11_window.c
index c89d2ec5..d9d34b01 100644
--- a/src/x11_window.c
+++ b/src/x11_window.c
@@ -2773,7 +2773,7 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
     }
 }
 
-void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+void _glfwPlatformSetClipboardString(const char* string)
 {
     free(_glfw.x11.clipboardString);
     _glfw.x11.clipboardString = strdup(string);
@@ -2791,7 +2791,7 @@ void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
     }
 }
 
-const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+const char* _glfwPlatformGetClipboardString(void)
 {
     return getSelectionString(_glfw.x11.CLIPBOARD);
 }
diff --git a/tests/clipboard.c b/tests/clipboard.c
index a24d0c07..7281a05d 100644
--- a/tests/clipboard.c
+++ b/tests/clipboard.c
@@ -67,7 +67,7 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
             {
                 const char* string;
 
-                string = glfwGetClipboardString(window);
+                string = glfwGetClipboardString(NULL);
                 if (string)
                     printf("Clipboard contains \"%s\"\n", string);
                 else
@@ -79,7 +79,7 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
             if (mods == MODIFIER)
             {
                 const char* string = "Hello GLFW World!";
-                glfwSetClipboardString(window, string);
+                glfwSetClipboardString(NULL, string);
                 printf("Setting clipboard to \"%s\"\n", string);
             }
             break;