diff --git a/main/pbx.c b/main/pbx.c
index 2915683f3a..049b398b6a 100644
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -11069,9 +11069,9 @@ static void unload_pbx(void)
 	if (device_state_sub) {
 		device_state_sub = ast_event_unsubscribe(device_state_sub);
 	}
-	if (device_state_tps) {
-		ast_taskprocessor_unreference(device_state_tps);
-		device_state_tps = NULL;
+	if (extension_state_tps) {
+		ast_taskprocessor_unreference(extension_state_tps);
+		extension_state_tps = NULL;
 	}
 
 	/* Unregister builtin applications */