diff --git a/unix/example_sysvshm_test.go b/unix/example_sysvshm_test.go
index 6d2bee7..2ae8c1a 100644
--- a/unix/example_sysvshm_test.go
+++ b/unix/example_sysvshm_test.go
@@ -19,7 +19,7 @@
 		log.Fatal("sysv shm create failed:", err)
 	}
 
-	// warning: sysv shared memory segments persist even after after a process
+	// warning: sysv shared memory segments persist even after a process
 	// is destroyed, so it's very important to explicitly delete it when you
 	// don't need it anymore.
 	defer func() {