diff --git a/lab01/main.cpp b/lab01/main.cpp
index 03685e1..64f13b0 100644
--- a/lab01/main.cpp
+++ b/lab01/main.cpp
@@ -45,8 +45,15 @@ main(int argc, char* argv[])
             curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
             res = curl_easy_perform(curl);
             curl_easy_cleanup(curl);
+            if (res != CURLE_OK) {
+                fprintf(stderr, "curl_easy_perform() failed: %s\n",
+                curl_easy_strerror(res));
+                exit(1);
+            }
+            curl_easy_cleanup(curl);
         }
-        return 0;
+
+            return 0;
     }
 
     const size_t SCREEN_WIDTH = 80;