diff --git a/ssh.c b/ssh.c
index dca0a728..849ddb7f 100644
--- a/ssh.c
+++ b/ssh.c
@@ -900,6 +900,8 @@ static void ssh_free(Backend *be)
 	ssh_gss_cleanup(ssh->gss_state.libs);
 #endif
 
+    delete_callbacks_for_context(ssh); /* likely to catch ic_out_raw */
+
     need_random_unref = ssh->need_random_unref;
     sfree(ssh);