diff --git a/lib/roken/version-script.map b/lib/roken/version-script.map
index 20017953c..9f192ec35 100644
--- a/lib/roken/version-script.map
+++ b/lib/roken/version-script.map
@@ -10,6 +10,7 @@ HEIMDAL_ROKEN_1.0 {
 		cgetnum;
 		cgetset;
 		cgetustr;
+		ct_memcmp;
 		err;
 		errx;
 		free_getarg_strings;