diff --git a/libc/include/sys/shm.h b/libc/include/sys/shm.h
index ccd3b36..4723eba 100644
--- a/libc/include/sys/shm.h
+++ b/libc/include/sys/shm.h
@@ -42,10 +42,10 @@
 
 typedef unsigned long shmatt_t;
 
-void* shmat(int, const void*, int) __INTRODUCED_IN(26);
-int shmctl(int, int, struct shmid_ds*) __INTRODUCED_IN(26);
-int shmdt(const void*) __INTRODUCED_IN(26);
-int shmget(key_t, size_t, int) __INTRODUCED_IN(26);
+void* shmat(int __shm_id, const void* __addr, int __flags) __INTRODUCED_IN(26);
+int shmctl(int __shm_id, int __cmd, struct shmid_ds* __buf) __INTRODUCED_IN(26);
+int shmdt(const void* __addr) __INTRODUCED_IN(26);
+int shmget(key_t __key, size_t __size, int __flags) __INTRODUCED_IN(26);
 
 __END_DECLS