diff --git a/app/gui/PcView.qml b/app/gui/PcView.qml
index 8f447584..a9e08e6e 100644
--- a/app/gui/PcView.qml
+++ b/app/gui/PcView.qml
@@ -100,7 +100,8 @@ GridView {
                             pairDialog.open()
                         }
                         else {
-                            // TODO: error dialog
+                            // cannot pair while something is streaming or attempting to pair
+                            pairingFailedDialog.open()
                         }
                     }
                 }
@@ -111,6 +112,15 @@ GridView {
         }
     }
 
+    MessageDialog {
+        id: pairingFailedDialog
+        // don't allow edits to the rest of the window while open
+        modality:Qt.WindowModal
+
+        text:"This PC is busy: make sure no game is streaming, and try again"
+        standardButtons: Dialog.OK
+    }
+
     MessageDialog {
         id: pairDialog
         // don't allow edits to the rest of the window while open