diff --git a/src/platformsupport/glxconvenience/qglxconvenience.cpp b/src/platformsupport/glxconvenience/qglxconvenience.cpp
index 81bccb1c251..e2f4922c8a2 100644
--- a/src/platformsupport/glxconvenience/qglxconvenience.cpp
+++ b/src/platformsupport/glxconvenience/qglxconvenience.cpp
@@ -224,6 +224,8 @@ GLXFBConfig qglx_findConfig(Display *display, int screen , QSurfaceFormat format
             }
 
             QXlibPointer<XVisualInfo> visual(glXGetVisualFromFBConfig(display, candidate));
+            if (!visual)
+                continue;
             int actualRed;
             int actualGreen;
             int actualBlue;