Index: generic/nsf.c
===================================================================
diff -u -rf7bd273b3e8b6929dcb662c66a8e870d467190da -rdbb46164bb74315ad51015c87b034637ad574034
--- generic/nsf.c	(.../nsf.c)	(revision f7bd273b3e8b6929dcb662c66a8e870d467190da)
+++ generic/nsf.c	(.../nsf.c)	(revision dbb46164bb74315ad51015c87b034637ad574034)
@@ -8146,7 +8146,7 @@
       }
     }
   } else {
-    
+#if defined(NSF_WITH_VALUE_WARNINGS)
     if (RUNTIME_STATE(interp)->debugLevel > 0) {
       char *value = ObjStr(objPtr);
       if (*value == '-' 
@@ -8158,7 +8158,7 @@
 	       value, pPtr->name);
       }
     } 
-
+#endif
     *clientData = (ClientData)objPtr;
     result = TCL_OK;
   }
Index: generic/nsf.h
===================================================================
diff -u -rf7bd273b3e8b6929dcb662c66a8e870d467190da -rdbb46164bb74315ad51015c87b034637ad574034
--- generic/nsf.h	(.../nsf.h)	(revision f7bd273b3e8b6929dcb662c66a8e870d467190da)
+++ generic/nsf.h	(.../nsf.h)	(revision dbb46164bb74315ad51015c87b034637ad574034)
@@ -88,8 +88,8 @@
 
 #define NSF_WITH_OS_RESOLVER 1
 #define NSF_WITH_ASSERTIONS 1
+#define NSF_WITH_VALUE_WARNINGS 1
 
-
 /* activate/deacticate memory tracing 
 #define NSF_MEM_TRACE 1
 #define NSF_MEM_COUNT 1