diff --git a/photon/libc/sys/linux/__syscall.h b/photon/libc/sys/linux/__syscall.h
index c2f0060..49121c6 100644
--- a/photon/libc/sys/linux/__syscall.h
+++ b/photon/libc/sys/linux/__syscall.h
@@ -3,15 +3,15 @@
 
 #include <stdint.h>
 
-extern intptr_t __syscall0(unsigned int id);
-extern intptr_t __syscall1(unsigned int id, uintptr_t p0);
-extern intptr_t __syscall2(unsigned int id, uintptr_t p0, uintptr_t p1);
+extern intptr_t __syscall0(uintptr_t id);
+extern intptr_t __syscall1(uintptr_t id, uintptr_t p0);
+extern intptr_t __syscall2(uintptr_t id, uintptr_t p0, uintptr_t p1);
 extern intptr_t __syscall3(uintptr_t id, uintptr_t p0, uintptr_t p1, uintptr_t p2);
-extern intptr_t __syscall4(unsigned int id, uintptr_t p0, uintptr_t p1, uintptr_t p2,
+extern intptr_t __syscall4(uintptr_t id, uintptr_t p0, uintptr_t p1, uintptr_t p2,
         uintptr_t p3);
-extern intptr_t __syscall5(unsigned int id, uintptr_t p0, uintptr_t p1, uintptr_t p2,
+extern intptr_t __syscall5(uintptr_t id, uintptr_t p0, uintptr_t p1, uintptr_t p2,
         uintptr_t p3, uintptr_t p4);
-extern intptr_t __syscall6(unsigned int id, uintptr_t p0, uintptr_t p1, uintptr_t p2,
+extern intptr_t __syscall6(uintptr_t id, uintptr_t p0, uintptr_t p1, uintptr_t p2,
         uintptr_t p3, uintptr_t p4, uintptr_t p5);
 
 #endif