diff --git a/package/portmap/portmap.mk b/package/portmap/portmap.mk
index 4a5fe62523..bebafce376 100644
--- a/package/portmap/portmap.mk
+++ b/package/portmap/portmap.mk
@@ -15,6 +15,7 @@ PORTMAP_FLAGS += NO_FORK=1
 endif
 
 define PORTMAP_BUILD_CMDS
+	CFLAGS="$(TARGET_CFLAGS)" \
 	$(MAKE) CC="$(TARGET_CC)" -C $(@D) $(PORTMAP_FLAGS)
 endef