diff --git a/simgear/structure/event_mgr.hxx b/simgear/structure/event_mgr.hxx
index 66face68..746f03c0 100644
--- a/simgear/structure/event_mgr.hxx
+++ b/simgear/structure/event_mgr.hxx
@@ -51,7 +51,9 @@ private:
     void siftDown(int n);
     void siftUp(int n);
     void growArray();
-    void check();
+
+    // gcc complains there is no function specification anywhere.
+    // void check();
 
     double _now;
     HeapEntry *_table;