diff --git a/mk/px4_targets.mk b/mk/px4_targets.mk
index cf15610b8f..f2ed1a1773 100644
--- a/mk/px4_targets.mk
+++ b/mk/px4_targets.mk
@@ -120,6 +120,7 @@ px4:
 px4-clean: clean CHECK_MODULES px4-archives-clean px4-cleandep
 	$(v) /bin/rm -rf $(PX4_ROOT)/makefiles/build $(PX4_ROOT)/Build $(PX4_ROOT)/Images/*.px4 $(PX4_ROOT)/Images/*.bin
 	$(v) /bin/rm -rf $(PX4_ROOT)/src/modules/uORB/topics $(PX4_ROOT)/src/platforms/nuttx/px4_messages
+	$(v) /bin/rm -f $(SRCROOT)/*.o
 
 px4-cleandep: clean
 	$(v) mkdir -p $(PX4_ROOT)/Build