diff --git a/libc/kernel/uapi/asm-generic/shmbuf.h b/libc/kernel/uapi/asm-generic/shmbuf.h
index 6d4d867..1d003ba 100644
--- a/libc/kernel/uapi/asm-generic/shmbuf.h
+++ b/libc/kernel/uapi/asm-generic/shmbuf.h
@@ -22,33 +22,33 @@
 struct shmid64_ds {
   struct ipc64_perm shm_perm;
   size_t shm_segsz;
+#if __BITS_PER_LONG == 64
   __kernel_time_t shm_atime;
-#if __BITS_PER_LONG != 64
-  unsigned long __unused1;
-#endif
   __kernel_time_t shm_dtime;
-#if __BITS_PER_LONG != 64
-  unsigned long __unused2;
-#endif
   __kernel_time_t shm_ctime;
-#if __BITS_PER_LONG != 64
-  unsigned long __unused3;
+#else
+  unsigned long shm_atime;
+  unsigned long shm_atime_high;
+  unsigned long shm_dtime;
+  unsigned long shm_dtime_high;
+  unsigned long shm_ctime;
+  unsigned long shm_ctime_high;
 #endif
   __kernel_pid_t shm_cpid;
   __kernel_pid_t shm_lpid;
-  __kernel_ulong_t shm_nattch;
-  __kernel_ulong_t __unused4;
-  __kernel_ulong_t __unused5;
+  unsigned long shm_nattch;
+  unsigned long __unused4;
+  unsigned long __unused5;
 };
 struct shminfo64 {
-  __kernel_ulong_t shmmax;
-  __kernel_ulong_t shmmin;
-  __kernel_ulong_t shmmni;
-  __kernel_ulong_t shmseg;
-  __kernel_ulong_t shmall;
-  __kernel_ulong_t __unused1;
-  __kernel_ulong_t __unused2;
-  __kernel_ulong_t __unused3;
-  __kernel_ulong_t __unused4;
+  unsigned long shmmax;
+  unsigned long shmmin;
+  unsigned long shmmni;
+  unsigned long shmseg;
+  unsigned long shmall;
+  unsigned long __unused1;
+  unsigned long __unused2;
+  unsigned long __unused3;
+  unsigned long __unused4;
 };
 #endif