diff --git a/Userland/Libraries/LibGL/GL/gl.h b/Userland/Libraries/LibGL/GL/gl.h
index 07e86be54e..de4ad90561 100644
--- a/Userland/Libraries/LibGL/GL/gl.h
+++ b/Userland/Libraries/LibGL/GL/gl.h
@@ -317,7 +317,6 @@ typedef float GLclampf;
 typedef double GLdouble;
 typedef unsigned int GLenum;
 typedef unsigned int GLbitfield;
-typedef unsigned char GLboolean;
 
 GLAPI void glBegin(GLenum mode);
 GLAPI void glClear(GLbitfield mask);