diff --git a/tests/signal_test.cpp b/tests/signal_test.cpp
index fcfcb18..1292568 100644
--- a/tests/signal_test.cpp
+++ b/tests/signal_test.cpp
@@ -48,13 +48,13 @@
   int min_signal = SIGHUP;
   int max_signal = SIGRTMAX;
 
-#if __BIONIC__
-  // bionic's sigset_t is too small: 32 bits instead of 64.
+#if defined(__BIONIC__) && !defined(__mips__)
+  // bionic's sigset_t is too small for ARM and x86: 32 bits instead of 64.
   // This means you can't refer to any of the real-time signals.
   // See http://b/3038348 and http://b/5828899.
-  max_signal = 31;
+  max_signal = 32;
 #else
-  // Other C libraries are perfectly capable of using their largest signal.
+  // Other C libraries (or bionic for MIPS) are perfectly capable of using their largest signal.
   ASSERT_GE(sizeof(sigset_t) * 8, static_cast<size_t>(SIGRTMAX));
 #endif