diff --git a/dlls/msdaps/row_server.idl b/dlls/msdaps/row_server.idl
index afe9463df8a..a59e6d89787 100644
--- a/dlls/msdaps/row_server.idl
+++ b/dlls/msdaps/row_server.idl
@@ -229,7 +229,7 @@ coclass wine_rowset_proxy
 
 }
 
-cpp_quote("extern HRESULT create_row_server( IUnknown*, LPVOID* );")
-cpp_quote("extern HRESULT create_row_marshal( IUnknown*, LPVOID* );")
-cpp_quote("extern HRESULT create_rowset_server( IUnknown*, LPVOID* );")
-cpp_quote("extern HRESULT create_rowset_marshal( IUnknown*, LPVOID* );")
+cpp_quote("extern HRESULT create_row_server( IUnknown*, LPVOID* ) DECLSPEC_HIDDEN;")
+cpp_quote("extern HRESULT create_row_marshal( IUnknown*, LPVOID* ) DECLSPEC_HIDDEN;")
+cpp_quote("extern HRESULT create_rowset_server( IUnknown*, LPVOID* ) DECLSPEC_HIDDEN;")
+cpp_quote("extern HRESULT create_rowset_marshal( IUnknown*, LPVOID* ) DECLSPEC_HIDDEN;")