diff --git a/lib/std/c/darwin.zig b/lib/std/c/darwin.zig
index f0ea120699c434e6bdf979d4bbbbd5b7e556efa4..7e475a057b87df7e68bbce4c5c681510405bd780 100644
--- a/lib/std/c/darwin.zig
+++ b/lib/std/c/darwin.zig
@@ -1494,6 +1494,8 @@ pub const E = enum(u16) {
     OWNERDEAD = 105,
     /// Interface output queue is full
     QFULL = 106,
+    /// Capabilities insufficient
+    NOTCAPABLE = 107,
     _,
 };