diff --git a/libc/unistd/setuid.cpp b/libc/unistd/setuid.cpp
index c7051b58..028eb7b5 100644
--- a/libc/unistd/setuid.cpp
+++ b/libc/unistd/setuid.cpp
@@ -27,7 +27,7 @@
 
 #include <unistd.h>
 
-DEFN_SYSCALL1(uid_t, sys_setuid, SYSCALL_GETUID, uid_t);
+DEFN_SYSCALL1(uid_t, sys_setuid, SYSCALL_SETUID, uid_t);
 
 extern "C" int setuid(uid_t uid)
 {