diff --git a/run.py b/run.py
index 1cecab2..aceab00 100755
--- a/run.py
+++ b/run.py
@@ -36,13 +36,14 @@ parser.add_argument('-f', '--face', help='use this face', dest='source_img')
 parser.add_argument('-t', '--target', help='replace this face', dest='target_path')
 parser.add_argument('-o', '--output', help='save output to this file', dest='output_file')
 parser.add_argument('--keep-fps', help='maintain original fps', dest='keep_fps', action='store_true', default=False)
-if torch.cuda.is_available():
-    parser.add_argument('--gpu', help='use gpu', dest='gpu', action='store_true', default=False)
+parser.add_argument('--gpu', help='use gpu', dest='gpu', action='store_true', default=False)
 parser.add_argument('--keep-frames', help='keep frames directory', dest='keep_frames', action='store_true', default=False)
 
 for name, value in vars(parser.parse_args()).items():
     args[name] = value
 
+if torch.cuda.is_available() not args['gpu']:
+    quit("You are using --gpu flag but CUDA isn't available on your system.")
 
 sep = "/"
 if os.name == "nt":