diff --git a/packages/zoe/src/contractFacet/exit.js b/packages/zoe/src/contractFacet/exit.js
index 2d541ba28060..ac1cd92791e0 100644
--- a/packages/zoe/src/contractFacet/exit.js
+++ b/packages/zoe/src/contractFacet/exit.js
@@ -35,6 +35,7 @@ export const makeMakeExiter = baggage => {
       exit() {
         const { state } = this;
         state.zcfSeat.exit();
+        state.zcfSeat = undefined;
       },
     },
     {
diff --git a/packages/zoe/src/contractFacet/zcfSeat.js b/packages/zoe/src/contractFacet/zcfSeat.js
index 2ba5f7e4796d..15cc5403d12f 100644
--- a/packages/zoe/src/contractFacet/zcfSeat.js
+++ b/packages/zoe/src/contractFacet/zcfSeat.js
@@ -159,6 +159,7 @@ export const createSeatManager = (
         assertNoStagedAllocation(self);
         doExitSeat(self);
         E(zoeInstanceAdmin).exitSeat(zcfSeatToSeatHandle.get(self), completion);
+        zcfSeatToSeatHandle.delete(self);
       },
       fail(
         reason = Error(
@@ -179,6 +180,7 @@ export const createSeatManager = (
             zcfSeatToSeatHandle.get(self),
             harden(reason),
           );
+          zcfSeatToSeatHandle.delete(self);
         }
         return reason;
       },