diff --git a/packages/adapter-ameyo/lib/main.ts b/packages/adapter-ameyo/lib/main.ts
index 3f06190..99ce3a0 100644
--- a/packages/adapter-ameyo/lib/main.ts
+++ b/packages/adapter-ameyo/lib/main.ts
@@ -45,7 +45,7 @@ class AmeyoAdapter implements IAdapter {
         onAgentsForCallTransfer: (data: GenericObject) => void
         onCallTransferStatus: (data: GenericObject) => void;
     };
-    private currentCallState: string;
+    private currentCallState: CALL_STATES;
     private eventListenerUrl: string;
     private baseUrl: string;
     private sessionId: string;
diff --git a/packages/common/lib/Interfaces/IAdapter.ts b/packages/common/lib/Interfaces/IAdapter.ts
index 00012c4..f941592 100644
--- a/packages/common/lib/Interfaces/IAdapter.ts
+++ b/packages/common/lib/Interfaces/IAdapter.ts
@@ -28,7 +28,7 @@ class IAdapter {
 
     getAgentAvailability(): boolean {return  false}
 
-    getLatestCallState() {return CALL_STATES.IDLE}
+    getLatestCallState(): CALL_STATES {return CALL_STATES.IDLE}
     getAvailableAgentsForCallTransfer() {}
     transferCallToAgent(data: GenericObject) {console.log("transfer call", data)}
 }