diff --git a/du4/program.c b/du4/program.c
index 6a5bbd5..c72067f 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -36,7 +36,7 @@ int main() {
         num1 = strtof(line, &next);
         while (*next == ' ') next++;
         if (*next != op) {
-            printf("CHYBA\n");
+            printf("KONIEC\n");
             goto next_line;
         }
         next++;
@@ -67,10 +67,6 @@ int main() {
                 result = num1 * num2;
                 break;
             case '/':
-                if (num2 == 0) {
-                    printf("CHYBA\n");
-                    goto next_line;
-                }
                 result = num1 / num2;
                 break;
         }