diff --git a/src/hb-unicode.cc b/src/hb-unicode.cc
index 9a6471e52..aa2735bed 100644
--- a/src/hb-unicode.cc
+++ b/src/hb-unicode.cc
@@ -165,7 +165,7 @@ hb_unicode_funcs_get_default ()
 
 #if !defined(HB_NO_UNICODE_FUNCS) && defined(HB_UNICODE_FUNCS_NIL)
 #error "Could not find any Unicode functions implementation, you have to provide your own"
-#error "Consider building hb-ucd.cc.  If you absolutely want to build without any, check the code."
+#error "Consider building hb-ucd.cc.  If you absolutely want to build without any, define HB_NO_UNICODE_FUNCS."
 #endif
 
 /**