diff --git a/dlls/jscript/dispex.c b/dlls/jscript/dispex.c
index 4ffb378d528..07c4cb7618a 100644
--- a/dlls/jscript/dispex.c
+++ b/dlls/jscript/dispex.c
@@ -368,7 +368,7 @@ static HRESULT invoke_prop_func(jsdisp_t *This, jsdisp_t *jsthis, dispex_prop_t
         if(FAILED(hres))
             return hres;
 
-        hres = disp_call(This->ctx, V_DISPATCH(&prop->u.var), DISPID_VALUE, flags, &new_dp, retv, ei, caller);
+        hres = disp_call(This->ctx, V_DISPATCH(&prop->u.var), DISPID_VALUE, flags, &new_dp, retv, ei);
 
         if(new_dp.rgvarg != dp->rgvarg) {
             heap_free(new_dp.rgvarg);
@@ -991,8 +991,7 @@ HRESULT jsdisp_call_value(jsdisp_t *jsthis, WORD flags, DISPPARAMS *dp, VARIANT
     return hres;
 }
 
-HRESULT jsdisp_call(jsdisp_t *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIANT *retv,
-        jsexcept_t *ei, IServiceProvider *caller)
+HRESULT jsdisp_call(jsdisp_t *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei)
 {
     dispex_prop_t *prop;
 
@@ -1004,7 +1003,7 @@ HRESULT jsdisp_call(jsdisp_t *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIA
     if(!prop)
         return DISP_E_MEMBERNOTFOUND;
 
-    return invoke_prop_func(disp, disp, prop, flags, dp, retv, ei, caller);
+    return invoke_prop_func(disp, disp, prop, flags, dp, retv, ei, NULL);
 }
 
 HRESULT jsdisp_call_name(jsdisp_t *disp, const WCHAR *name, WORD flags, DISPPARAMS *dp, VARIANT *retv,
@@ -1024,8 +1023,7 @@ HRESULT jsdisp_call_name(jsdisp_t *disp, const WCHAR *name, WORD flags, DISPPARA
     return invoke_prop_func(disp, disp, prop, flags, dp, retv, ei, caller);
 }
 
-HRESULT disp_call(script_ctx_t *ctx, IDispatch *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIANT *retv,
-        jsexcept_t *ei, IServiceProvider *caller)
+HRESULT disp_call(script_ctx_t *ctx, IDispatch *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei)
 {
     jsdisp_t *jsdisp;
     IDispatchEx *dispex;
@@ -1033,7 +1031,7 @@ HRESULT disp_call(script_ctx_t *ctx, IDispatch *disp, DISPID id, WORD flags, DIS
 
     jsdisp = iface_to_jsdisp((IUnknown*)disp);
     if(jsdisp) {
-        hres = jsdisp_call(jsdisp, id, flags, dp, retv, ei, caller);
+        hres = jsdisp_call(jsdisp, id, flags, dp, retv, ei);
         jsdisp_release(jsdisp);
         return hres;
     }
diff --git a/dlls/jscript/engine.c b/dlls/jscript/engine.c
index 0ae142a99e5..b96c55fd8d2 100644
--- a/dlls/jscript/engine.c
+++ b/dlls/jscript/engine.c
@@ -990,7 +990,7 @@ static HRESULT interp_new(exec_ctx_t *ctx)
 
     jsstack_to_dp(ctx, arg, &dp);
     hres = disp_call(ctx->parser->script, V_DISPATCH(constr), DISPID_VALUE,
-            DISPATCH_CONSTRUCT, &dp, &v, ctx->ei, NULL/*FIXME*/);
+            DISPATCH_CONSTRUCT, &dp, &v, ctx->ei);
     if(FAILED(hres))
         return hres;
 
@@ -1015,7 +1015,7 @@ static HRESULT interp_call(exec_ctx_t *ctx)
 
     jsstack_to_dp(ctx, argn, &dp);
     hres = disp_call(ctx->parser->script, V_DISPATCH(objv), DISPID_VALUE, DISPATCH_METHOD, &dp,
-            do_ret ? &v : NULL, ctx->ei, NULL/*FIXME*/);
+            do_ret ? &v : NULL, ctx->ei);
     if(FAILED(hres))
         return hres;
 
@@ -1042,7 +1042,7 @@ static HRESULT interp_call_member(exec_ctx_t *ctx)
         return throw_type_error(ctx->parser->script, ctx->ei, id, NULL);
 
     jsstack_to_dp(ctx, argn, &dp);
-    hres = disp_call(ctx->parser->script, obj, id, DISPATCH_METHOD, &dp, do_ret ? &v : NULL, ctx->ei, NULL/*FIXME*/);
+    hres = disp_call(ctx->parser->script, obj, id, DISPATCH_METHOD, &dp, do_ret ? &v : NULL, ctx->ei);
     if(FAILED(hres))
         return hres;
 
diff --git a/dlls/jscript/jscript.h b/dlls/jscript/jscript.h
index 9248f23fde8..ed2402dae8a 100644
--- a/dlls/jscript/jscript.h
+++ b/dlls/jscript/jscript.h
@@ -206,9 +206,9 @@ HRESULT create_dispex(script_ctx_t*,const builtin_info_t*,jsdisp_t*,jsdisp_t**)
 HRESULT init_dispex(jsdisp_t*,script_ctx_t*,const builtin_info_t*,jsdisp_t*) DECLSPEC_HIDDEN;
 HRESULT init_dispex_from_constr(jsdisp_t*,script_ctx_t*,const builtin_info_t*,jsdisp_t*) DECLSPEC_HIDDEN;
 
-HRESULT disp_call(script_ctx_t*,IDispatch*,DISPID,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*) DECLSPEC_HIDDEN;
+HRESULT disp_call(script_ctx_t*,IDispatch*,DISPID,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*) DECLSPEC_HIDDEN;
 HRESULT jsdisp_call_value(jsdisp_t*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*) DECLSPEC_HIDDEN;
-HRESULT jsdisp_call(jsdisp_t*,DISPID,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*) DECLSPEC_HIDDEN;
+HRESULT jsdisp_call(jsdisp_t*,DISPID,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*) DECLSPEC_HIDDEN;
 HRESULT jsdisp_call_name(jsdisp_t*,const WCHAR*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*) DECLSPEC_HIDDEN;
 HRESULT disp_propget(script_ctx_t*,IDispatch*,DISPID,VARIANT*,jsexcept_t*,IServiceProvider*) DECLSPEC_HIDDEN;
 HRESULT disp_propput(script_ctx_t*,IDispatch*,DISPID,VARIANT*,jsexcept_t*,IServiceProvider*) DECLSPEC_HIDDEN;
diff --git a/dlls/jscript/jsutils.c b/dlls/jscript/jsutils.c
index ba9f7801455..33540d72028 100644
--- a/dlls/jscript/jsutils.c
+++ b/dlls/jscript/jsutils.c
@@ -221,7 +221,7 @@ HRESULT to_primitive(script_ctx_t *ctx, VARIANT *v, jsexcept_t *ei, VARIANT *ret
 
         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
         if(SUCCEEDED(hres)) {
-            hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, &dp, ret, ei, NULL /*FIXME*/);
+            hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, &dp, ret, ei);
             if(FAILED(hres)) {
                 WARN("call error - forwarding exception\n");
                 jsdisp_release(jsdisp);
@@ -237,7 +237,7 @@ HRESULT to_primitive(script_ctx_t *ctx, VARIANT *v, jsexcept_t *ei, VARIANT *ret
 
         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
         if(SUCCEEDED(hres)) {
-            hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, &dp, ret, ei, NULL /*FIXME*/);
+            hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, &dp, ret, ei);
             if(FAILED(hres)) {
                 WARN("call error - forwarding exception\n");
                 jsdisp_release(jsdisp);