diff --git a/can-calc-bit-timing.c b/can-calc-bit-timing.c
index 49347f8..46803f2 100644
--- a/can-calc-bit-timing.c
+++ b/can-calc-bit-timing.c
@@ -660,12 +660,12 @@ int main(int argc, char *argv[])
 			break;
 
 		case '?':
-			print_usage(argv[0]);
+			print_usage(basename(argv[0]));
 			exit(EXIT_SUCCESS);
 			break;
 
 		default:
-			print_usage(argv[0]);
+			print_usage(basename(argv[0]));
 			exit(EXIT_FAILURE);
 			break;
 		}