diff --git a/storm/String.cpp b/storm/String.cpp
index 99fa0df..4f670d9 100644
--- a/storm/String.cpp
+++ b/storm/String.cpp
@@ -337,7 +337,7 @@ float SStrToFloat(const char* string) {
     SStrInitialize();
 
     double result;
-    bool negative;
+    bool negative = false;
 
     if (*string == '-') {
         negative = true;