diff --git a/openbox/session.c b/openbox/session.c
index 6e4c07d2..e259cf30 100644
--- a/openbox/session.c
+++ b/openbox/session.c
@@ -5,6 +5,8 @@
 void session_load(char *path) {}
 void session_startup(int argc, char **argv) {}
 void session_shutdown() {}
+ObSessionState* session_state_find(struct _ObClient *c) { return NULL; }
+void session_state_free(ObSessionState *state) {}
 
 #else