diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 686ce3c..9b8bf89 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -242,6 +242,9 @@
 # define ex_syntax		ex_ni
 # define ex_ownsyntax		ex_ni
 #endif
+#if !defined(FEAT_SYN_HL) || !defined(FEAT_RELTIME)
+# define ex_syntime		ex_ni
+#endif
 #ifndef FEAT_SPELL
 # define ex_spell		ex_ni
 # define ex_mkspell		ex_ni