diff --git a/webcam_capture_QR_code.py b/webcam_capture_QR_code.py
index d1854cc..3ca8c48 100644
--- a/webcam_capture_QR_code.py
+++ b/webcam_capture_QR_code.py
@@ -25,7 +25,7 @@ def managed_videocapture(cam_indexes):
         finally:
             # Code to release resource, e.g.:
             capture.release()
-    if ! cam_OK:
+    if not cam_OK:
         raise IOError("Cannot open webcam")
         sys.exit()