diff --git a/Source/cmVariableWatch.cxx b/Source/cmVariableWatch.cxx
index f5fdca465..3905e9bda 100644
--- a/Source/cmVariableWatch.cxx
+++ b/Source/cmVariableWatch.cxx
@@ -15,6 +15,7 @@ static const char* const cmVariableWatchAccessStrings[] =
 {
     "READ_ACCESS",
     "UNKNOWN_READ_ACCESS",
+    "UNKNOWN_DEFINED_ACCESS",
     "ALLOWED_UNKNOWN_READ_ACCESS",
     "MODIFIED_ACCESS",
     "REMOVED_ACCESS",