diff --git a/dapps/ui/build.rs b/dapps/ui/build.rs
index c4982b09c..395f513bd 100644
--- a/dapps/ui/build.rs
+++ b/dapps/ui/build.rs
@@ -17,6 +17,6 @@
 extern crate parity_dapps_glue;
 
 fn main() {
-	parity_dapps_glue::js::build(concat!(env!("CARGO_MANIFEST_DIR"), "../../js"));
+	parity_dapps_glue::js::build(concat!(env!("CARGO_MANIFEST_DIR"), "/../../js"));
 	parity_dapps_glue::generate();
 }
diff --git a/dapps/ui/src/lib.rs.in b/dapps/ui/src/lib.rs.in
index 81f46086d..319d17ed3 100644
--- a/dapps/ui/src/lib.rs.in
+++ b/dapps/ui/src/lib.rs.in
@@ -51,5 +51,5 @@ impl WebApp for App {
 
 #[test]
 fn test_js() {
-	parity_dapps_glue::js::build(concat!(env!("CARGO_MANIFEST_DIR"), "../../js"));
+	parity_dapps_glue::js::build(concat!(env!("CARGO_MANIFEST_DIR"), "/../../js"));
 }