diff --git a/src/cc65/error.c b/src/cc65/error.c
index b67fa1afd..db0debf8c 100644
--- a/src/cc65/error.c
+++ b/src/cc65/error.c
@@ -385,7 +385,7 @@ void UnreachableCodeWarning (void)
 */
 {
     if (IS_Get (&WarnUnreachableCode)) {
-	Warning ("Unreachable code");
+        Warning ("Unreachable code");
     }
 }