diff --git a/Source/cmGeneratorExpressionDAGChecker.cxx b/Source/cmGeneratorExpressionDAGChecker.cxx
index b9069ef60..0ac1a483d 100644
--- a/Source/cmGeneratorExpressionDAGChecker.cxx
+++ b/Source/cmGeneratorExpressionDAGChecker.cxx
@@ -148,8 +148,8 @@ bool cmGeneratorExpressionDAGChecker::EvaluatingLinkLibraries()
   return (strcmp(prop, "LINK_LIBRARIES") == 0
        || strcmp(prop, "LINK_INTERFACE_LIBRARIES") == 0
        || strcmp(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES") == 0
-       || strncmp(prop, "LINK_INTERFACE_LIBRARIES_", 26) == 0
-       || strncmp(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES_", 35) == 0);
+       || strncmp(prop, "LINK_INTERFACE_LIBRARIES_", 25) == 0
+       || strncmp(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES_", 34) == 0);
 }
 
 //----------------------------------------------------------------------------