diff --git a/.pvsconfig b/.pvsconfig
index 4d7413f0b4..ae3091a1fd 100644
--- a/.pvsconfig
+++ b/.pvsconfig
@@ -14,8 +14,6 @@
 //-V::539
 # Expression is always true/false.
 //-V::547
-# Expression of the 'A - B > 0' kind will work as 'A != B'.
-//-V::555
 # Possible array overrun.
 //-V::557
 # Part of conditional expression is always true/false.
diff --git a/Source/cmStringReplaceHelper.cxx b/Source/cmStringReplaceHelper.cxx
index 0e1845776e..8ccc094b8d 100644
--- a/Source/cmStringReplaceHelper.cxx
+++ b/Source/cmStringReplaceHelper.cxx
@@ -93,7 +93,7 @@ void cmStringReplaceHelper::ParseReplaceExpression()
       this->Replacements.emplace_back(
         this->ReplaceExpression.substr(l, r - l));
     } else {
-      if (r - l > 0) {
+      if (r != l) {
         this->Replacements.emplace_back(
           this->ReplaceExpression.substr(l, r - l));
       }