diff --git a/src/message.c b/src/message.c
index ab193f0..a4d2cc8 100644
--- a/src/message.c
+++ b/src/message.c
@@ -539,7 +539,7 @@
     return FALSE;
 }
 
-#ifdef FEAT_EVAL
+#if defined(FEAT_EVAL) || defined(PROTO)
 static garray_T ignore_error_list = GA_EMPTY;
 
     void