diff --git a/samples/license_plate_detection.c b/samples/license_plate_detection.c
index 3aab7fa..1a3113a 100644
--- a/samples/license_plate_detection.c
+++ b/samples/license_plate_detection.c
@@ -131,7 +131,7 @@ int main(int argc, char *argv[])
 		}
 
 	} else {
-		printf("0 boxes\n", nbox);
+		printf("0 boxes\n");
 	}
 
 	sod_image_blob_boxes_release(box);