diff --git a/src/x11_platform.h b/src/x11_platform.h
index a69705b3..bed461f7 100644
--- a/src/x11_platform.h
+++ b/src/x11_platform.h
@@ -115,7 +115,7 @@ typedef struct _GLFWlibraryX11
     GLboolean       hasEWMH;
     // Most recent error code received by X error handler
     int             errorCode;
-
+    // Clipboard string (while the selection is owned)
     char*           clipboardString;
 
     // LUT for mapping X11 key codes to GLFW key codes