diff --git a/du4/program.c b/du4/program.c
index 54aa8cb..71165ce 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -10,7 +10,7 @@ int main(){
         printf("CHYBA\n");
         return -1;
     }
-    int check = (action == '/') ? num1 / num2 : (action == '*') ? num1 * num2 : (action == '+') ? num1 + num2 : num1 - num2;
+    float check = (action == '/') ? num1 / num2 : (action == '*') ? num1 * num2 : (action == '+') ? num1 + num2 : num1 - num2;
     printf("%s\n", (check == answer) ? "OK" : "ZLE");
 
 }