diff --git a/libc/bionic/sys_msg.cpp b/libc/bionic/sys_msg.cpp
index 462c83b..9780d38 100644
--- a/libc/bionic/sys_msg.cpp
+++ b/libc/bionic/sys_msg.cpp
@@ -36,33 +36,17 @@
   // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
   cmd |= IPC_64;
 #endif
-#if defined(SYS_msgctl)
   return syscall(SYS_msgctl, id, cmd, buf);
-#else
-  return syscall(SYS_ipc, MSGCTL, id, cmd, 0, buf, 0);
-#endif
 }
 
 int msgget(key_t key, int flags) {
-#if defined(SYS_msgget)
   return syscall(SYS_msgget, key, flags);
-#else
-  return syscall(SYS_ipc, MSGGET, key, flags, 0, 0, 0);
-#endif
 }
 
 ssize_t msgrcv(int id, void* msg, size_t n, long type, int flags) {
-#if defined(SYS_msgrcv)
   return syscall(SYS_msgrcv, id, msg, n, type, flags);
-#else
-  return syscall(SYS_ipc, IPCCALL(1, MSGRCV), id, n, flags, msg, type);
-#endif
 }
 
 int msgsnd(int id, const void* msg, size_t n, int flags) {
-#if defined(SYS_msgsnd)
   return syscall(SYS_msgsnd, id, msg, n, flags);
-#else
-  return syscall(SYS_ipc, MSGSND, id, n, flags, msg, 0);
-#endif
 }
diff --git a/libc/bionic/sys_sem.cpp b/libc/bionic/sys_sem.cpp
index 058cfef..b97bf46 100644
--- a/libc/bionic/sys_sem.cpp
+++ b/libc/bionic/sys_sem.cpp
@@ -41,19 +41,11 @@
   va_start(ap, cmd);
   semun arg = va_arg(ap, semun);
   va_end(ap);
-#if defined(SYS_semctl)
   return syscall(SYS_semctl, id, num, cmd, arg);
-#else
-  return syscall(SYS_ipc, SEMCTL, id, num, cmd, &arg, 0);
-#endif
 }
 
 int semget(key_t key, int n, int flags) {
-#if defined(SYS_semget)
   return syscall(SYS_semget, key, n, flags);
-#else
-  return syscall(SYS_ipc, SEMGET, key, n, flags, 0, 0);
-#endif
 }
 
 int semop(int id, sembuf* ops, size_t op_count) {
@@ -64,6 +56,9 @@
 #if defined(SYS_semtimedop)
   return syscall(SYS_semtimedop, id, ops, op_count, ts);
 #else
+  // 32-bit x86 -- the only architecture without semtimedop(2) -- only has
+  // semtimedop_time64(2), but since we don't have any timespec64 stuff,
+  // it's less painful for us to just stick with the legacy ipc(2) here.
   return syscall(SYS_ipc, SEMTIMEDOP, id, op_count, 0, ops, ts);
 #endif
 }
diff --git a/libc/bionic/sys_shm.cpp b/libc/bionic/sys_shm.cpp
index f780e04..777b3ad 100644
--- a/libc/bionic/sys_shm.cpp
+++ b/libc/bionic/sys_shm.cpp
@@ -32,16 +32,7 @@
 #include <unistd.h>
 
 void* shmat(int id, const void* address, int flags) {
-#if defined(SYS_shmat)
   return reinterpret_cast<void*>(syscall(SYS_shmat, id, address, flags));
-#else
-  // See the kernel's ipc/syscall.c for the other side of this dance.
-  void* result = nullptr;
-  if (syscall(SYS_ipc, SHMAT, id, flags, &result, address, 0) == -1) {
-    return reinterpret_cast<void*>(-1);
-  }
-  return result;
-#endif
 }
 
 int shmctl(int id, int cmd, struct shmid_ds* buf) {
@@ -49,25 +40,13 @@
   // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
   cmd |= IPC_64;
 #endif
-#if defined(SYS_shmctl)
   return syscall(SYS_shmctl, id, cmd, buf);
-#else
-  return syscall(SYS_ipc, SHMCTL, id, cmd, 0, buf, 0);
-#endif
 }
 
 int shmdt(const void* address) {
-#if defined(SYS_shmdt)
   return syscall(SYS_shmdt, address);
-#else
-  return syscall(SYS_ipc, SHMDT, 0, 0, 0, address, 0);
-#endif
 }
 
 int shmget(key_t key, size_t size, int flags) {
-#if defined(SYS_shmget)
   return syscall(SYS_shmget, key, size, flags);
-#else
-  return syscall(SYS_ipc, SHMGET, key, size, flags, 0, 0);
-#endif
 }