diff --git a/arangod/VocBase/voc-types.h b/arangod/VocBase/voc-types.h
index ff8a4f0e34..f381fec8c0 100644
--- a/arangod/VocBase/voc-types.h
+++ b/arangod/VocBase/voc-types.h
@@ -212,8 +212,10 @@ namespace triagens {
 ////////////////////////////////////////////////////////////////////////////////
 
         static void setNumbers (int numberInScope, int numberActive) {
+#ifdef TRI_ENABLE_MAINTAINER_MODE
           _numberTrxInScope = numberInScope;
           _numberTrxActive = numberActive;
+#endif
         }
 
 ////////////////////////////////////////////////////////////////////////////////