diff --git a/build.sh b/build.sh
index 0bf6168..48c4f9b 100755
--- a/build.sh
+++ b/build.sh
@@ -13,7 +13,8 @@ ARCH=$1
 VERSION=$2
 TYPE=$3
 URL=$4
-FILENAME="nwjs-$TYPE_$VERSION-1_$ARCH.deb"
+
+FILENAME="nwjs-${TYPE}_$VERSION-1_$ARCH.deb"
 
 mkdir -p out