diff --git a/tools/configure b/tools/configure
index 4eb6a29..7745c9f 100755
--- a/tools/configure
+++ b/tools/configure
@@ -47,12 +47,12 @@ crosswincc () {
  sdl_libs=""
  prefixtools i586-mingw32msvc-
  if [ $1 = "sdl" -a -z "$sdl"]; then
-   sdl_cflags="`sdl-config --cflags`"
-   sdl_libs="`sdl-config --libs`"
+   sdl_cflags=`sdl-config --cflags`
+   sdl_libs=`sdl-config --libs`
  fi
  # add cross-compiler option(s)
- GCCOPTS="$GCCOPTS " + $sdl_cflags
- LDOPTS="-mconsole" + $sdl_libs
+ GCCOPTS="$GCCOPTS $sdl_cflags"
+ LDOPTS="-mconsole $sdl_libs"

  output="rockboxui.exe" # use this as output binary name
  crosscompile="yes"