diff --git a/package/mdadm/mdadm.mk b/package/mdadm/mdadm.mk
index 6ee0bb60c9..0a2eb4e5bd 100644
--- a/package/mdadm/mdadm.mk
+++ b/package/mdadm/mdadm.mk
@@ -16,6 +16,7 @@ MDADM_BUILD_OPTS = \
 	CC=$(TARGET_CC) \
 	COROSYNC=-DNO_COROSYNC \
 	DLM=-DNO_DLM \
+	CWFLAGS="" \
 	CXFLAGS="$(MDADM_CXFLAGS)" \
 	CPPFLAGS="$(TARGET_CPPFLAGS) -DBINDIR=\\\"/sbin\\\"" \
 	CHECK_RUN_DIR=0