diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72cfc2f94..d2494f2f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -102,6 +102,7 @@ Docs: https://docs.openclaw.ai
 - Security/session_status: enforce sandbox session-tree visibility and shared agent-to-agent access guards before reading or mutating target session state, so sandboxed subagents can no longer inspect parent session metadata or write parent model overrides via `session_status`.
 - Security/nodes: treat the `nodes` agent tool as owner-only fallback policy so non-owner senders cannot reach paired-node approval or invoke paths through the shared tool set.
 - Telegram/final preview cleanup follow-up: clear stale cleanup-retain state only for transient preview finals so archived-preview retains no longer leave a stale partial bubble beside a later fallback-sent final. (#41763) Thanks @obviyus.
+- Signal/config schema: accept `channels.signal.accountUuid` in strict config validation so loop-protection configs no longer fail with an unrecognized-key error. (#35578) Thanks @ingyukoh.
 
 ## 2026.3.8
 
diff --git a/src/config/config.schema-regressions.test.ts b/src/config/config.schema-regressions.test.ts
index 4125cb1b3..f8fbdc27b 100644
--- a/src/config/config.schema-regressions.test.ts
+++ b/src/config/config.schema-regressions.test.ts
@@ -184,4 +184,16 @@ describe("config schema regressions", () => {
 
     expect(res.ok).toBe(false);
   });
+
+  it("accepts signal accountUuid for loop protection", () => {
+    const res = validateConfigObject({
+      channels: {
+        signal: {
+          accountUuid: "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+        },
+      },
+    });
+
+    expect(res.ok).toBe(true);
+  });
 });
diff --git a/src/config/zod-schema.providers-core.ts b/src/config/zod-schema.providers-core.ts
index 0bb676fa5..833a4a81d 100644
--- a/src/config/zod-schema.providers-core.ts
+++ b/src/config/zod-schema.providers-core.ts
@@ -977,6 +977,7 @@ export const SignalAccountSchemaBase = z
     enabled: z.boolean().optional(),
     configWrites: z.boolean().optional(),
     account: z.string().optional(),
+    accountUuid: z.string().optional(),
     httpUrl: z.string().optional(),
     httpHost: z.string().optional(),
     httpPort: z.number().int().positive().optional(),