diff --git a/src/communication.ts b/src/communication.ts
index 02734d9..4a9cb8e 100644
--- a/src/communication.ts
+++ b/src/communication.ts
@@ -32,10 +32,12 @@ export class Communicator {
 							return this.addFlashcardCallback!(c.card, s);
 						case commandKinds.removeFlashcard:
 							return this.removeFlashcardCallback!(c.card, s);
+						default:
+							console.warn(`Unimplemented command ${c}`);
 					}
 				} catch (e) {
 					if (e instanceof ReferenceError)
-						console.warn(`Unimplemented command ${c.commandKind}`);
+						console.warn(`Unimplemented command ${c}`);
 					else throw e;
 				}
 			}