diff --git a/packages/core/lib/useCallSdk.ts b/packages/core/lib/useCallSdk.ts
index fb181b0..b9e70e3 100644
--- a/packages/core/lib/useCallSdk.ts
+++ b/packages/core/lib/useCallSdk.ts
@@ -76,16 +76,16 @@ function UseCallSdk(adapter : any) {
     // @ts-expect-error sdfsf
    const [callState] = useReducer<any>(reducer, initialState,()=> initialState);
 
-   function registerOnCallIncoming(callback : ()=>void) {
+   function registerOnCallIncoming(callback : (callState: GenericObject)=>void) {
         //dispatch({type: actionTypes.CALL_INCOMING, payload: {}})
         adapter.registerOnCallIncoming(callback);
     }
 
-    function registerOnCallConnected(callback : ()=>void) {
+    function registerOnCallConnected(callback : (callState: GenericObject)=>void) {
         adapter.registerOnCallConnected(callback);
     }
 
-    function registerOnCallDisconnected(callback : ()=>void) {
+    function registerOnCallDisconnected(callback : (callState: GenericObject)=>void) {
         adapter.registerOnCallDisconnected(callback);
     }