diff --git a/rules.mk b/rules.mk
index cbe604bae6..36bd22cac7 100644
--- a/rules.mk
+++ b/rules.mk
@@ -81,7 +81,7 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
   REAL_GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))
   GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux
   DIR_SUFFIX:=_$(LIBC)-$(LIBCV)$(if $(CONFIG_arm),_eabi)
-  BIN_DIR:=$(BIN_DIR)$(if $(CONFIG_UCLIBC),,-$(LIBC))
+  BIN_DIR:=$(BIN_DIR)$(if $(CONFIG_USE_UCLIBC),,-$(LIBC))
   BUILD_DIR:=$(BUILD_DIR_BASE)/target-$(ARCH)$(ARCH_SUFFIX)$(DIR_SUFFIX)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
   STAGING_DIR:=$(TOPDIR)/staging_dir/target-$(ARCH)$(ARCH_SUFFIX)$(DIR_SUFFIX)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
   BUILD_DIR_TOOLCHAIN:=$(BUILD_DIR_BASE)/toolchain-$(ARCH)$(ARCH_SUFFIX)_gcc-$(GCCV)$(DIR_SUFFIX)