diff --git a/miscutils/mt.c b/miscutils/mt.c
index 583674b..2d35c7c 100644
--- a/miscutils/mt.c
+++ b/miscutils/mt.c
@@ -75,7 +75,7 @@
 	}
 
 	if (code->name == 0) {
-		errorMsg("unrecognized opcode %s.\n", argv[1]);
+		error_msg("unrecognized opcode %s.\n", argv[1]);
 		return EXIT_FAILURE;
 	}