diff --git a/dlls/advpack/advpack.c b/dlls/advpack/advpack.c
index 112d38ab438..919c0bce52d 100644
--- a/dlls/advpack/advpack.c
+++ b/dlls/advpack/advpack.c
@@ -452,7 +452,7 @@ HRESULT WINAPI RebootCheckOnInstallW(HWND hWnd, LPCWSTR pszINF,
 }
 
 /* registers the OCX if do_reg is TRUE, unregisters it otherwise */
-HRESULT do_ocx_reg(HMODULE hocx, BOOL do_reg)
+HRESULT do_ocx_reg(HMODULE hocx, BOOL do_reg, const WCHAR *flags, const WCHAR *param)
 {
     DLLREGISTER reg_func;
 
@@ -519,7 +519,7 @@ HRESULT WINAPI RegisterOCX(HWND hWnd, HINSTANCE hInst, LPCSTR cmdline, INT show)
     if (!hm)
         goto done;
 
-    hr = do_ocx_reg(hm, TRUE);
+    hr = do_ocx_reg(hm, TRUE, str_flags, param);
 
 done:
     FreeLibrary(hm);
diff --git a/dlls/advpack/advpack_private.h b/dlls/advpack/advpack_private.h
index 23babf61dd1..cbbbf4819af 100644
--- a/dlls/advpack/advpack_private.h
+++ b/dlls/advpack/advpack_private.h
@@ -21,7 +21,7 @@
 #ifndef __ADVPACK_PRIVATE_H
 #define __ADVPACK_PRIVATE_H
 
-HRESULT do_ocx_reg(HMODULE hocx, BOOL do_reg) DECLSPEC_HIDDEN;
+HRESULT do_ocx_reg(HMODULE hocx, BOOL do_reg, const WCHAR *flags, const WCHAR *param) DECLSPEC_HIDDEN;
 LPWSTR get_parameter(LPWSTR *params, WCHAR separator) DECLSPEC_HIDDEN;
 void set_ldids(HINF hInf, LPCWSTR pszInstallSection, LPCWSTR pszWorkingDir) DECLSPEC_HIDDEN;
 
diff --git a/dlls/advpack/install.c b/dlls/advpack/install.c
index 129ea828146..6079625a04f 100644
--- a/dlls/advpack/install.c
+++ b/dlls/advpack/install.c
@@ -161,7 +161,7 @@ static HRESULT register_ocxs_callback(HINF hinf, PCWSTR field, const void *arg)
         hm = LoadLibraryExW(buffer, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
         if (hm)
         {
-            if (do_ocx_reg(hm, TRUE) != S_OK)
+            if (do_ocx_reg(hm, TRUE, NULL, NULL) != S_OK)
                 hr = E_FAIL;
 
             FreeLibrary(hm);