diff --git a/common.mk b/common.mk
index 70f5eed..d467434 100644
--- a/common.mk
+++ b/common.mk
@@ -110,14 +110,14 @@ LDFLAGS :=
 # Of course, you have to update the symlinks when you compile a new
 # version of the SDK.
 ifdef OPENWRT_VERSION
-	TOOLCHAIN_PREFIX := $$HOME/openwrt/atheros/trunk
+	TOOLCHAIN_PREFIX := $${HOME}/openwrt/atheros/trunk
 	STAGING_DIR := $(TOOLCHAIN_PREFIX)/staging_dir
 	TOOLCHAIN1 := $(TOOLCHAIN_PREFIX)/toolchain-mips_gcc_uClibc
 	TOOLCHAIN_BIN := $(TOOLCHAIN1)/bin
 	TOOLCHAIN2 := $(TOOLCHAIN_PREFIX)/target-mips_uClibc
 
 	ifeq "$(OPENWRT_VERSION)" "10.03"
-		TOOLCHAIN_PREFIX := $$HOME/openwrt/atheros/10.03/staging_dir
+		TOOLCHAIN_PREFIX := $${HOME}/openwrt/atheros/10.03/staging_dir
 		STAGING_DIR := $(TOOLCHAIN_PREFIX)
 		TOOLCHAIN1 := $(TOOLCHAIN_PREFIX)/toolchain-mips_gcc-4.3.3+cs_uClibc-0.9.30.1
 		TOOLCHAIN_BIN := $(TOOLCHAIN1)/usr/bin