diff --git a/libc/include/signal.h b/libc/include/signal.h
index 2027d70..0aa798c 100644
--- a/libc/include/signal.h
+++ b/libc/include/signal.h
@@ -81,8 +81,10 @@
 
 #define si_timerid si_tid /* glibc compatibility. */
 
-/* sigset_t is already large enough on LP64, but LP32's sigset_t is just `unsigned long`. */
-#if defined(__LP64__)
+/* sigset_t is already large enough on LP64 and mips, but other LP32's sigset_t
+ * is just `unsigned long`.
+ */
+#if defined(__LP64__) || defined(__mips__)
 typedef sigset_t sigset64_t;
 #else
 typedef struct { unsigned long __bits[_KERNEL__NSIG/LONG_BIT]; } sigset64_t;
diff --git a/tests/signal_test.cpp b/tests/signal_test.cpp
index 2b414e5..d374c50 100644
--- a/tests/signal_test.cpp
+++ b/tests/signal_test.cpp
@@ -285,7 +285,9 @@
   ASSERT_TRUE(original_sa.sa_handler == NULL);
   ASSERT_TRUE(original_sa.sa_sigaction == NULL);
   ASSERT_EQ(0U, original_sa.sa_flags & ~sa_restorer);
+#ifdef SA_RESTORER
   ASSERT_EQ(bool(original_sa.sa_flags & sa_restorer), bool(original_sa.sa_restorer));
+#endif
 
   // Set a traditional sa_handler signal handler.
   auto no_op_signal_handler = [](int) {};
@@ -301,7 +303,9 @@
   ASSERT_TRUE(sa.sa_handler == no_op_signal_handler);
   ASSERT_TRUE((void*) sa.sa_sigaction == (void*) sa.sa_handler);
   ASSERT_EQ(static_cast<unsigned>(SA_ONSTACK), sa.sa_flags & ~sa_restorer);
+#ifdef SA_RESTORER
   ASSERT_EQ(bool(sa.sa_flags & sa_restorer), bool(sa.sa_restorer));
+#endif
 
   // Set a new-style sa_sigaction signal handler.
   auto no_op_sigaction = [](int, siginfo_t*, void*) {};
@@ -317,7 +321,9 @@
   ASSERT_TRUE(sa.sa_sigaction == no_op_sigaction);
   ASSERT_TRUE((void*) sa.sa_sigaction == (void*) sa.sa_handler);
   ASSERT_EQ(static_cast<unsigned>(SA_ONSTACK | SA_SIGINFO), sa.sa_flags & ~sa_restorer);
+#ifdef SA_RESTORER
   ASSERT_EQ(bool(sa.sa_flags & sa_restorer), bool(sa.sa_restorer));
+#endif
 
   // Put everything back how it was.
   ASSERT_EQ(0, sigaction_fn(sig, &original_sa, NULL));