diff --git a/package/portmap/portmap.mk b/package/portmap/portmap.mk
index bebafce376..e996824307 100644
--- a/package/portmap/portmap.mk
+++ b/package/portmap/portmap.mk
@@ -19,6 +19,10 @@ define PORTMAP_BUILD_CMDS
 	$(MAKE) CC="$(TARGET_CC)" -C $(@D) $(PORTMAP_FLAGS)
 endef
 
+define PORTMAP_CLEAN_CMDS
+	$(MAKE) -C $(@D) clean
+endef
+
 define PORTMAP_INSTALL_TARGET_CMDS
 	for sbin in $(PORTMAP_SBINS); do \
 		$(INSTALL) -D $(@D)/$$sbin $(TARGET_DIR)/sbin/$$sbin; \