diff --git a/src/xcb/wm-extension.c b/src/xcb/wm-extension.c
index f2c1808..6e5efb8 100644
--- a/src/xcb/wm-extension.c
+++ b/src/xcb/wm-extension.c
@@ -182,14 +182,16 @@ bool get_window_tag(xcb_window_t window, client_tag_info_t *client_info) {
                      XCB_ATOM_CARDINAL, 0, 2);
   xcb_get_property_reply_t *reply = xcb_get_property_reply(conn, cookie, NULL);
   int length = xcb_get_property_value_length(reply);
-  if (length >= 2) {
+  bool result = length >= 2;
+  if (result) {
     uint32_t *data = xcb_get_property_value(reply);
     client_info->tags = data[0];
     client_info->monitor_index = data[1];
-    return true;
-  } else {
-    return false;
   }
+
+  free(reply);
+
+  return result;
 }
 
 void set_window_tag(xcb_window_t window, client_tag_info_t *client_info) {