diff --git a/source/dub/internal/vibecompat/core/file.d b/source/dub/internal/vibecompat/core/file.d
index 2f02c74..8c51f74 100644
--- a/source/dub/internal/vibecompat/core/file.d
+++ b/source/dub/internal/vibecompat/core/file.d
@@ -22,11 +22,6 @@
 import std.utf;
 
 
-version(Posix){
-	private extern(C) int mkstemps(char* templ, int suffixlen);
-}
-
-
 /* Add output range support to File
 */
 struct RangeFile {