diff --git a/Makefile b/Makefile
index 791b49d3b..5bf219335 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ $(if $(findstring $(space),$(TOPDIR)),$(error ERROR: The path to the OpenWrt dir
 
 world:
 
-DISTRO_PKG_CONFIG:=$(shell which -a pkg-config | grep -E '\/usr' -m 1)
+DISTRO_PKG_CONFIG:=$(shell which -a pkg-config | grep '/usr' -m 1)
 export PATH:=$(TOPDIR)/staging_dir/host/bin:$(PATH)
 
 ifneq ($(OPENWRT_BUILD),1)