diff --git a/wineopenxr/wineopenxr.spec b/wineopenxr/wineopenxr.spec
index e76d15f4..b4460ea3 100644
--- a/wineopenxr/wineopenxr.spec
+++ b/wineopenxr/wineopenxr.spec
@@ -1,3 +1,3 @@
 @ stdcall xrNegotiateLoaderRuntimeInterface(ptr ptr) wine_xrNegotiateLoaderRuntimeInterface
-@ stdcall __wineopenxr_GetVulkanInstanceExtensions(ptr)
-@ stdcall __wineopenxr_GetVulkanDeviceExtensions(ptr)
+@ stdcall __wineopenxr_GetVulkanInstanceExtensions(long ptr ptr)
+@ stdcall __wineopenxr_GetVulkanDeviceExtensions(long ptr ptr)