diff --git a/common/dsnlexer.cpp b/common/dsnlexer.cpp
index c44ca0ca09..42a9f2bb9c 100644
--- a/common/dsnlexer.cpp
+++ b/common/dsnlexer.cpp
@@ -480,7 +480,7 @@ static bool isNumber( const char* cp, const char* limit )
         }
     }
 
-    return sawNumber;
+    return sawNumber && cp==limit;
 }