diff --git a/du4/program.c b/du4/program.c
index 14a9caf..aefa25e 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -48,7 +48,7 @@ int main() {
 
         if (valid) {
             // Evaluate expression
-            float result;
+            float result=0;
             switch (op) {
                 case '+':
                     result = num1 + num2;