diff --git a/dlls/virtdisk/virtdisk.spec b/dlls/virtdisk/virtdisk.spec
index f35b8df524b..d3d90cf8f87 100644
--- a/dlls/virtdisk/virtdisk.spec
+++ b/dlls/virtdisk/virtdisk.spec
@@ -4,7 +4,7 @@
 @ stub CompactVirtualDisk
 @ stub CreateVirtualDisk
 @ stub DeleteVirtualDiskMetadata
-@ stub DetachVirtualDisk
+@ stdcall DetachVirtualDisk(ptr long long)
 @ stub EnumerateVirtualDiskMetadata
 @ stub ExpandVirtualDisk
 @ stub GetAllAttachedVirtualDiskPhysicalPaths
diff --git a/dlls/virtdisk/virtdisk_main.c b/dlls/virtdisk/virtdisk_main.c
index ef7f176704e..c4d13241698 100644
--- a/dlls/virtdisk/virtdisk_main.c
+++ b/dlls/virtdisk/virtdisk_main.c
@@ -58,3 +58,9 @@ DWORD WINAPI OpenVirtualDisk(VIRTUAL_STORAGE_TYPE *type, const WCHAR *path, VIRT
 
     return ERROR_CALL_NOT_IMPLEMENTED;
 }
+
+DWORD WINAPI DetachVirtualDisk(HANDLE handle, DETACH_VIRTUAL_DISK_FLAG flags, ULONG specific_flags)
+{
+    FIXME("(%p, 0x%x, %d): stub\n", handle, flags, specific_flags);
+    return ERROR_INVALID_PARAMETER;
+}