diff --git a/src/crypto/verification/Base.js b/src/crypto/verification/Base.js
index aa68d7b89..8d39f2d64 100644
--- a/src/crypto/verification/Base.js
+++ b/src/crypto/verification/Base.js
@@ -169,6 +169,10 @@ export default class VerificationBase extends EventEmitter {
     done() {
         this._endTimer(); // always kill the activity timer
         if (!this._done) {
+            if (this.roomId) {
+                // verification in DM requires a done message
+                this._send("m.key.verification.done", {});
+            }
             this._resolve();
         }
     }