diff --git a/build.sh b/build.sh
index 301adaad..822e6494 100755
--- a/build.sh
+++ b/build.sh
@@ -63,7 +63,7 @@ fi
 if [ -f "$destination" ]; then
     rm -rf $destination
 fi
-if [ ! -f "$source"]; then
+if [ ! -f "$source" ]; then
     source="../..$7/config/sys/$config_file"
 fi
 cp $source $destination