diff --git a/tools/dockcross-make-builder.sh b/tools/dockcross-make-builder.sh
index afbd310..231d5ca 100755
--- a/tools/dockcross-make-builder.sh
+++ b/tools/dockcross-make-builder.sh
@@ -16,7 +16,7 @@ if (( $# >= 1 )); then
     chmod +x ./dockcross-"$image"
 
     echo "Build $build_file"
-    ./dockcross-"$image" bash -c 'make CXX=${CXX} CC=${CC} AR=${AR} AS=${AS} LD=${LD} CPP=${CPP} FC=${FC}' $make_arg
+    ./dockcross-"$image" bash -c 'make CXX=${CXX} CC=${CC} AR=${AR} AS=${AS} LD=${LD} CPP=${CPP} FC=${FC} '"$make_arg"
 else
     echo "Usage: ${0##*/} <docker imag (ex: linux-x64/linux-x64-clang/linux-arm64/windows-shared-x64/windows-static-x64...)> <make arg.>"
     exit 1