diff --git a/src/crypto/rand/rand_getentropy.go b/src/crypto/rand/rand_getentropy.go
index f82018a..dd72537 100644
--- a/src/crypto/rand/rand_getentropy.go
+++ b/src/crypto/rand/rand_getentropy.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build darwin || openbsd
-// +build darwin openbsd
+//go:build (darwin && !ios) || openbsd
+// +build darwin,!ios openbsd
 
 package rand
 
diff --git a/src/internal/syscall/unix/getentropy_darwin.go b/src/internal/syscall/unix/getentropy_darwin.go
index e1a410a..c75006b 100644
--- a/src/internal/syscall/unix/getentropy_darwin.go
+++ b/src/internal/syscall/unix/getentropy_darwin.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin && !ios
+// +build darwin,!ios
+
 package unix
 
 import (