diff --git a/plugins/platforms/x11/standalone/glxbackend.cpp b/plugins/platforms/x11/standalone/glxbackend.cpp
--- a/plugins/platforms/x11/standalone/glxbackend.cpp
+++ b/plugins/platforms/x11/standalone/glxbackend.cpp
@@ -509,6 +509,22 @@
     return m_visualDepthHash.value(visual);
 }
 
+static inline int bitCount(uint32_t mask)
+{
+#if defined(__GNUC__)
+    return __builtin_popcount(mask);
+#else
+    int count = 0;
+
+    while (mask) {
+        count += (mask & 1);
+        mask >>= 1;
+    }
+
+    return count;
+#endif
+}
+
 FBConfigInfo *GlxBackend::infoForVisual(xcb_visualid_t visual)
 {
     auto it = m_fbconfigHash.constFind(visual);
diff --git a/utils.h b/utils.h
--- a/utils.h
+++ b/utils.h
@@ -196,23 +196,6 @@
 
 void checkNonExistentClients();
 
-static inline int bitCount(uint32_t mask)
-{
-#if defined(__GNUC__)
-    return __builtin_popcount(mask);
-#else
-    int count = 0;
-
-    while (mask) {
-        count += (mask & 1);
-        mask >>= 1;
-    }
-
-    return count;
-#endif
-}
-
-
 /**
  * Separate the concept of an unet QPoint and 0,0
  */