diff --git a/package/busybox/busybox.mk b/package/busybox/busybox.mk
index 549e150..9154c08 100644
--- a/package/busybox/busybox.mk
+++ b/package/busybox/busybox.mk
@@ -27,12 +27,17 @@ BUSYBOX_LDFLAGS = \
 ifeq ($(BR2_PACKAGE_LIBTIRPC),y)
 BUSYBOX_DEPENDENCIES += libtirpc
 BUSYBOX_CFLAGS += -I$(STAGING_DIR)/usr/include/tirpc/
-BUSYBOX_LDFLAGS += -ltirpc
+# Don't use LDFLAGS for -ltirpc, because LDFLAGS is used for
+# the non-final link of modules as well.
+BUSYBOX_CFLAGS_busybox += -ltirpc
 endif
 
 BUSYBOX_BUILD_CONFIG = $(BUSYBOX_DIR)/.config
 # Allows the build system to tweak CFLAGS
-BUSYBOX_MAKE_ENV = $(TARGET_MAKE_ENV) CFLAGS="$(BUSYBOX_CFLAGS)"
+BUSYBOX_MAKE_ENV = \
+	$(TARGET_MAKE_ENV) \
+	CFLAGS="$(BUSYBOX_CFLAGS)" \
+	CFLAGS_busybox="$(BUSYBOX_CFLAGS_busybox)"
 BUSYBOX_MAKE_OPTS = \
 	CC="$(TARGET_CC)" \
 	ARCH=$(KERNEL_ARCH) \