diff --git a/README.md b/README.md
index 26a6092a..6005f81b 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,7 @@ information on what to include when reporting a bug.
  - [Cocoa] Bugfix: The EGL and OSMesa libraries were not unloaded on termination
  - [X11] Bugfix: The OSMesa libray was not unloaded on termination
  - [X11] Bugfix: A malformed response during selection transfer could cause a segfault
+ - [X11] Bugfix: Some calls would reset Xlib to the default error handler (#2108)
  - [Wayland] Added support for file path drop events (#2040)
  - [Wayland] Bugfix: `glfwSetClipboardString` would fail if set to result of
    `glfwGetClipboardString`
diff --git a/src/x11_init.c b/src/x11_init.c
index 8dd433f1..6049904a 100644
--- a/src/x11_init.c
+++ b/src/x11_init.c
@@ -39,6 +39,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <assert.h>
 
 
 // Translate the X11 KeySyms for a key to a GLFW key code
@@ -1022,8 +1023,9 @@ static int errorHandler(Display *display, XErrorEvent* event)
 //
 void _glfwGrabErrorHandlerX11(void)
 {
+    assert(_glfw.x11.errorHandler == NULL);
     _glfw.x11.errorCode = Success;
-    XSetErrorHandler(errorHandler);
+    _glfw.x11.errorHandler = XSetErrorHandler(errorHandler);
 }
 
 // Clears the X error handler callback
@@ -1032,7 +1034,8 @@ void _glfwReleaseErrorHandlerX11(void)
 {
     // Synchronize to make sure all commands are processed
     XSync(_glfw.x11.display, False);
-    XSetErrorHandler(NULL);
+    XSetErrorHandler(_glfw.x11.errorHandler);
+    _glfw.x11.errorHandler = NULL;
 }
 
 // Reports the specified error, appending information about the last X error
diff --git a/src/x11_platform.h b/src/x11_platform.h
index 30c73a88..03ff9d24 100644
--- a/src/x11_platform.h
+++ b/src/x11_platform.h
@@ -222,6 +222,8 @@ typedef struct _GLFWlibraryX11
     XContext        context;
     // XIM input method
     XIM             im;
+    // The previous X error handler, to be restored later
+    XErrorHandler   errorHandler;
     // Most recent error code received by X error handler
     int             errorCode;
     // Primary selection string (while the primary selection is owned)