diff --git a/Makefile.dryice.js b/Makefile.dryice.js
index 6c2d67db..e5c73ac0 100755
--- a/Makefile.dryice.js
+++ b/Makefile.dryice.js
@@ -236,7 +236,7 @@ function jsFileList(path, filter) {
         filter = /_test/;
 
     return fs.readdirSync(path).map(function(x) {
-        if (x.slice(-3) == ".js" && !filter.test(x))
+        if (x.slice(-3) == ".js" && !filter.test(x) && !/\s/.test(x))
             return x.slice(0, -3);
     }).filter(function(x){ return !!x });
 }