diff --git a/app/build.sh b/app/build.sh
index 472f2f05ce..03efe8d992 100755
--- a/app/build.sh
+++ b/app/build.sh
@@ -136,12 +136,12 @@ function check_xulrunner_hash {
 		echo
 		$CALLDIR/scripts/fetch_xulrunner -p $platform
 	else
-		recalculated_xulrunner_hash=$($CALLDIR/scripts/xulrunner_hash -p $platform)
+		recalculated_xulrunner_hash=$("$CALLDIR/scripts/xulrunner_hash" -p $platform)
 		current_xulrunner_hash=$(< "$CALLDIR/xulrunner/$platform_hash_file")
 		if [ "$current_xulrunner_hash" != "$recalculated_xulrunner_hash" ]; then 
 			echo "xulrunner hashes don't match -- redownloading"
 			echo
-			$CALLDIR/scripts/fetch_xulrunner -p $platform
+			"$CALLDIR/scripts/fetch_xulrunner" -p $platform
 			current_xulrunner_hash=$(< "$CALLDIR/xulrunner/$platform_hash_file")
 			if [ "$current_xulrunner_hash" != "$recalculated_xulrunner_hash" ]; then
 				echo "xulrunner hashes don't match after running fetch_xulrunner!"
diff --git a/app/scripts/fetch_xulrunner b/app/scripts/fetch_xulrunner
index cc31f90d9d..fe64e6b945 100755
--- a/app/scripts/fetch_xulrunner
+++ b/app/scripts/fetch_xulrunner
@@ -387,7 +387,7 @@ if [ $BUILD_MAC == 1 ]; then
 	#if [ ! -e "Firefox $GECKO_VERSION MacOS.zip" ]; then
 	#	rm "MacOS.zip"
 	#fi
-	echo $($SCRIPT_DIR/xulrunner_hash -p m) > hash-mac
+	echo $("$SCRIPT_DIR/xulrunner_hash" -p m) > hash-mac
 fi
 
 if [ $BUILD_WIN == 1 ]; then
@@ -452,7 +452,7 @@ if [ $BUILD_WIN == 1 ]; then
 		echo
 		echo
 	done
-	echo $($SCRIPT_DIR/xulrunner_hash -p w) > hash-win
+	echo $("$SCRIPT_DIR/xulrunner_hash" -p w) > hash-win
 fi
 
 if [ $BUILD_LINUX == 1 ]; then
diff --git a/app/scripts/xulrunner_hash b/app/scripts/xulrunner_hash
index dd9149beea..04e7e1de3a 100755
--- a/app/scripts/xulrunner_hash
+++ b/app/scripts/xulrunner_hash
@@ -36,7 +36,7 @@ else
 fi
 
 xulrunner_content=$(< "$SCRIPT_DIR/fetch_xulrunner")
-xulrunner_gecko_hash=$(echo -n "$GECKO_VERSION - $xulrunner_content" | openssl dgst -sha256)
+xulrunner_gecko_hash=$(echo -n "$GECKO_VERSION - '$xulrunner_content'" | openssl dgst -sha256)
 
 echo "$xulrunner_gecko_hash"