diff --git a/dlls/mssip32/main.c b/dlls/mssip32/main.c
index 91ec17f9303..7d137018114 100644
--- a/dlls/mssip32/main.c
+++ b/dlls/mssip32/main.c
@@ -44,3 +44,21 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
     }
     return TRUE;
 }
+
+/*****************************************************
+ *    DllRegisterServer (MSSIP32.@)
+ */
+HRESULT WINAPI DllRegisterServer(void)
+{
+    FIXME("Not implemented.\n");
+    return E_UNEXPECTED;
+}
+
+/*****************************************************
+ *    DllUnregisterServer (MSSIP32.@)
+ */
+HRESULT WINAPI DllUnregisterServer(void)
+{
+    FIXME("Not implemented.\n");
+    return E_UNEXPECTED;
+}
diff --git a/dlls/mssip32/mssip32.spec b/dlls/mssip32/mssip32.spec
index 0c09bfbdbe2..b7fd8690214 100644
--- a/dlls/mssip32/mssip32.spec
+++ b/dlls/mssip32/mssip32.spec
@@ -5,5 +5,5 @@
 @ stub CryptSIPPutSignedDataMsg
 @ stub CryptSIPRemoveSignedDataMsg
 @ stub CryptSIPVerifyIndirectData
-@ stub DllRegisterServer
-@ stub DllUnregisterServer
+@ stdcall -private DllRegisterServer()
+@ stdcall -private DllUnregisterServer()