diff --git a/src/btstack_run_loop_base.c b/src/btstack_run_loop_base.c
index 74b431a71..2610fad3d 100644
--- a/src/btstack_run_loop_base.c
+++ b/src/btstack_run_loop_base.c
@@ -2,3 +2,7 @@
  *  btstack_run_loop_base.c was integrated into btstack_run_loop.c
  *  Deprecated - will be removed in future releases
  */
+
+// dummy function added to avoid warning about empty file
+void btstack_run_loop_base_dummy(void) {
+}