diff --git a/src/video/x11/SDL_x11opengl.c b/src/video/x11/SDL_x11opengl.c
index c8ef1f156..947000f90 100644
--- a/src/video/x11/SDL_x11opengl.c
+++ b/src/video/x11/SDL_x11opengl.c
@@ -532,7 +532,7 @@ X11_GL_CreateContext(_THIS, SDL_Window * window)
     GLXContext context = NULL, share_context;
 
     if (_this->gl_config.share_with_current_context) {
-        share_context = SDL_GL_GetCurrentContext();
+        share_context = (GLXContext)SDL_GL_GetCurrentContext();
     } else {
         share_context = NULL;
     }