diff --git a/lib/checkleakautovar.cpp b/lib/checkleakautovar.cpp
index e19947070..cc02044e8 100644
--- a/lib/checkleakautovar.cpp
+++ b/lib/checkleakautovar.cpp
@@ -483,7 +483,7 @@ void CheckLeakAutoVar::checkScope(const Token * const startToken,
                 tok = tok->next();
             while (Token::Match(tok, "%name% ::|."))
                 tok = tok->tokAt(2);
-            bool isnull = tok->hasKnownIntValue() && tok->values().front().intvalue == 0;
+            const bool isnull = tok->hasKnownIntValue() && tok->values().front().intvalue == 0;
             if (!isnull && tok->varId() && tok->strAt(1) != "[") {
                 VarInfo::AllocInfo allocation(arrayDelete ? -2 : -1, VarInfo::DEALLOC);
                 changeAllocStatus(varInfo, allocation, tok, tok);