diff --git a/session.c b/session.c
index 3977146..e042189 100644
--- a/session.c
+++ b/session.c
@@ -118,7 +118,7 @@ const char* session_getstr(const char* name)
 void session_setstr(const char* name, const char* value)
 {
   /* FIXME: use _set when bglibs 1.103 is released */
-  session_strs_remove(&session.nums, &name);
+  session_strs_remove(&session.strs, &name);
   if (session_strs_add(&session.strs, &name, &value) == 0)
     die_oom(111);
 }