diff --git a/du3/program.c b/du3/program.c
index a90be35..042feb8 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -36,10 +36,10 @@ int main() {
         result2 = cislo1 * cislo2;
         break;
     case '/':
-            if (cislo2 == 0) {
-                printf("ZLE\n");
+            if (cislo2 == 0 || znak == ':') {
+                printf("CHYBA\n");
                 return 0;
-            }    
+            } 
                 result2 = cislo1 / cislo2;
                 break;
             default:
diff --git a/du3/program.exe b/du3/program.exe
index 051cf26..f6b8103 100644
Binary files a/du3/program.exe and b/du3/program.exe differ