diff --git a/scripts/check-toolchain-clean.sh b/scripts/check-toolchain-clean.sh
index af24e740b7..34b82dec5d 100755
--- a/scripts/check-toolchain-clean.sh
+++ b/scripts/check-toolchain-clean.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-eval `grep CONFIG_GCC_VERSION .config`
+eval "$(grep CONFIG_GCC_VERSION .config)"
 CONFIG_TOOLCHAIN_BUILD_VER="$CONFIG_GCC_VERSION-$(cat toolchain/build_version)"
 touch .toolchain_build_ver
 [ "$CONFIG_TOOLCHAIN_BUILD_VER" = "$(cat .toolchain_build_ver)" ] && exit 0