diff --git a/du4/program.c b/du4/program.c
index afbee1a..1406a7d 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -23,6 +23,7 @@ int main() {
         equals = false;
         memset(number1, '\0', 25);
         memset(number2, '\0', 25);
+        memset(result, '\0', 30);
         while(input[counter] != '\0' && input[counter] != '\n'){
             symbol = input[counter++];
             while (isspace(symbol))