diff --git a/src/syntax.c b/src/syntax.c
index 4f6ef92..483a9b0 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -6537,7 +6537,7 @@
 }
 #endif
 
-#ifdef FEAT_PROFILE
+#if defined(FEAT_PROFILE) || defined(PROTO)
 /*
  * ":syntime".
  */