diff --git a/libc/arch-arm/bionic/futex_arm.S b/libc/arch-arm/bionic/futex_arm.S
index 4131cdb..0aba278 100644
--- a/libc/arch-arm/bionic/futex_arm.S
+++ b/libc/arch-arm/bionic/futex_arm.S
@@ -26,13 +26,12 @@
  * SUCH DAMAGE.
  */
 
-#include <asm/unistd.h>
-#include <machine/asm.h>
+#include <private/bionic_asm.h>
 
 #define FUTEX_WAIT 0
 #define FUTEX_WAKE 1
 
-// __futex_syscall3(*ftx, op, val)
+// int __futex_syscall3(volatile void* ftx, int op, int count)
 ENTRY(__futex_syscall3)
     mov     ip, r7
     ldr     r7, =__NR_futex
@@ -41,12 +40,12 @@
     bx      lr
 END(__futex_syscall3)
 
-// __futex_syscall4(*ftx, op, val, *timespec)
+// int __futex_syscall4(volatile void* ftx, int op, int val, const struct timespec* timeout)
 ENTRY(__futex_syscall4)
     b __futex_syscall3
 END(__futex_syscall4)
 
-// __futex_wait(*ftx, val, *timespec)
+// int __futex_wait(volatile void* ftx, int val, const struct timespec* timeout)
 ENTRY(__futex_wait)
     mov     ip, r7
     mov     r3, r2
@@ -58,7 +57,7 @@
     bx      lr
 END(__futex_wait)
 
-// __futex_wake(*ftx, counter)
+// int __futex_wake(volatile void* ftx, int count)
 ENTRY(__futex_wake)
     mov     ip, r7
     mov     r2, r1