diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
index 1f36a1ad2a..492fbf7e10 100644
--- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
+++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
@@ -711,8 +711,7 @@ void QGLXContext::queryDummyContext()
 
 bool QGLXContext::supportsThreading()
 {
-    if (!m_queriedDummyContext)
-        queryDummyContext();
+    queryDummyContext();
     return m_supportsThreading;
 }