diff --git a/src/sources/windows.rs b/src/sources/windows.rs
index 9ca22dc..610b1bc 100644
--- a/src/sources/windows.rs
+++ b/src/sources/windows.rs
@@ -19,13 +19,14 @@ impl Window {
 
     fn is_normal_window(&self, con: &ewmh::Connection, window: u32) -> Result<bool, xcb::GenericError> {
         let wm_type_reply = ewmh::get_wm_window_type(con, window).get_reply()?;
+
         for atom in wm_type_reply.atoms() {
             if *atom == con.WM_WINDOW_TYPE_NORMAL() {
                 return Ok(true);
             }
         }
 
-        Err(xcb::GenericError{ptr: ptr::null_mut()})
+        Ok(false)
     }
 
     fn window_category(&self, con: &ewmh::Connection, window: u32) -> Result<String, xcb::GenericError> {
@@ -94,7 +95,7 @@ impl Source for Window {
             match self.is_normal_window(&ewmh_conn, *w) {
                 Ok(true) => {},
                 Ok(false) => continue,
-                Err(_err) => continue
+                Err(_err) => {}
             }
 
             let title = self.window_title(&ewmh_conn, *w).unwrap();