diff --git a/README.md b/README.md
index 75d09bb9..d406c878 100644
--- a/README.md
+++ b/README.md
@@ -131,6 +131,7 @@ information on what to include when reporting a bug.
  - [Cocoa] Bugfix: A connected Apple AirPlay would emit a useless error (#1791)
  - [Wayland] Bugfix: `glfwSetClipboardString` would fail if set to result of
    `glfwGetClipboardString`
+ - [Wayland] Bugfix: Data source creation error would cause double free at termination
 
 
 ## Contact
diff --git a/src/wl_window.c b/src/wl_window.c
index 0bea8974..e425da78 100644
--- a/src/wl_window.c
+++ b/src/wl_window.c
@@ -1817,6 +1817,7 @@ void _glfwPlatformSetClipboardString(const char* string)
         _glfwInputError(GLFW_PLATFORM_ERROR,
                         "Wayland: Impossible to create clipboard source");
         free(_glfw.wl.clipboardSendString);
+        _glfw.wl.clipboardSendString = NULL;
         return;
     }
     wl_data_source_add_listener(_glfw.wl.dataSource,