diff --git a/scripts/build/libc/mingw.sh b/scripts/build/libc/mingw.sh
index 3379d680..b737b231 100644
--- a/scripts/build/libc/mingw.sh
+++ b/scripts/build/libc/mingw.sh
@@ -209,7 +209,7 @@ do_libc()
         CT_EndStep
     fi
 
-    if [ ${CT_MINGW_TOOLS} = "y" ]; then
+    if [ "${CT_MINGW_TOOLS}" = "y" ]; then
         CT_DoStep INFO "Installing mingw-w64 companion tools"
         CT_mkdir_pushd "${CT_BUILD_DIR}/build-mingw-w64-tools"
         do_mingw_tools