diff --git a/lib/exprengine.cpp b/lib/exprengine.cpp
index df3ceee4d..7572bc223 100644
--- a/lib/exprengine.cpp
+++ b/lib/exprengine.cpp
@@ -1975,6 +1975,8 @@ void ExprEngine::runChecks(ErrorLogger *errorLogger, const Tokenizer *tokenizer,
             return;
         if (tok->hasKnownIntValue() && tok->getKnownIntValue() != 0)
             return;
+        if (value.isUninit())
+            return;
         float f = getKnownFloatValue(tok, 0.0f);
         if (f > 0.0f || f < 0.0f)
             return;