diff --git a/src/Magnum/AbstractQuery.h b/src/Magnum/AbstractQuery.h
index b7cff80c8..29f1f21d8 100644
--- a/src/Magnum/AbstractQuery.h
+++ b/src/Magnum/AbstractQuery.h
@@ -47,7 +47,7 @@ more information.
 @todo `QUERY_COUNTER_BITS` (not sure since when this is supported)
 */
 class MAGNUM_EXPORT AbstractQuery: public AbstractObject {
-    friend class Implementation::QueryState;
+    friend struct Implementation::QueryState;
 
     public:
         /** @brief Copying is not allowed */