diff --git a/src/hooks/session-recovery/hook.ts b/src/hooks/session-recovery/hook.ts
index 324a2731b..8dedd3a02 100644
--- a/src/hooks/session-recovery/hook.ts
+++ b/src/hooks/session-recovery/hook.ts
@@ -120,7 +120,7 @@ export function createSessionRecoveryHook(ctx: PluginInput, options?: SessionRec
           await resumeSession(ctx.client, resumeConfig)
         }
       } else if (errorType === "assistant_prefill_unsupported") {
-        success = true
+        success = false
       }
 
       return success