diff --git a/toolchain/glibc/common.mk b/toolchain/glibc/common.mk
index 0ffeef0f6a..090901e27f 100644
--- a/toolchain/glibc/common.mk
+++ b/toolchain/glibc/common.mk
@@ -16,6 +16,7 @@ PKG_HASH:=e54e0a934cd2bc94429be79da5e9385898d2306b9eaf3c92d5a77af96190f6bd
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
 HOST_BUILD_DIR:=$(BUILD_DIR_TOOLCHAIN)/$(PKG_SOURCE_SUBDIR)
 CUR_BUILD_DIR:=$(HOST_BUILD_DIR)-$(VARIANT)
+PATCH_DIR:=$(PATH_PREFIX)/patches
 
 include $(INCLUDE_DIR)/toolchain-build.mk