diff --git a/lib/std/c/darwin.zig b/lib/std/c/darwin.zig
index e2029391a911a6bb1dd66daea60d57b10e2e885a..ea156ff296ede73903b8eae87dd93bc2d8876efa 100644
--- a/lib/std/c/darwin.zig
+++ b/lib/std/c/darwin.zig
@@ -3865,4 +3865,3 @@ pub const MIN = struct {
 };
 
 pub extern "c" fn mincore(addr: *align(std.mem.page_size) const anyopaque, length: usize, vec: [*]u8) c_int;
-pub extern "c" fn os_proc_available_memory() usize;