diff --git a/sk1/main.c b/sk1/main.c
index 6473abf..832ebff 100644
--- a/sk1/main.c
+++ b/sk1/main.c
@@ -37,29 +37,29 @@ int main(int argc, char* argv[]) {
         result = compress_1(input_file, output_file);
         if (result < 0) {
             fprintf(stderr, "Chyba: Kompresia zlyhala.\n");
-            return 0;
+            return 1;
         }
     } else if (strcmp(argv[1], "-d") == 0) {
         result = decompress_1(input_file, output_file);
         if (result < 0) {
             fprintf(stderr, "Chyba: Dekompresia zlyhala.\n");
-            return 0;
+            return 1;
         }
     } else if (strcmp(argv[1], "-c2") == 0) {
         result = compress_2(input_file, output_file);
         if (result < 0) {
             fprintf(stderr, "Chyba: Kompresia zlyhala.\n");
-            return 0;
+            return 1;
         }
     } else if (strcmp(argv[1], "-d2") == 0) {
         result = decompress_2(input_file, output_file);
         if (result < 0) {
             fprintf(stderr, "Chyba: Dekompresia zlyhala.\n");
-            return 0;
+            return 1;
         }
     } else {
         fprintf(stderr, "Chyba: Neznámy argument. Použite -h pre zobrazenie pomoci.\n");
-        return 0;
+        return 1;
     }
 
     return 0;