diff --git a/js/src/util/NativeStack.cpp b/js/src/util/NativeStack.cpp
index b988fae..35c51ad 100644
--- a/js/src/util/NativeStack.cpp
+++ b/js/src/util/NativeStack.cpp
@@ -13,7 +13,7 @@
 #  if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
 #    include <pthread_np.h>
 #  endif
-#  if defined(SOLARIS) || defined(AIX)
+#  if defined(SOLARIS) || defined(__sun) || defined(AIX)
 #    include <ucontext.h>
 #  endif
 #  if defined(ANDROID) && !defined(__aarch64__)
@@ -40,7 +40,7 @@ void* js::GetNativeStackBaseImpl() {
   return static_cast<void*>(pTib->StackBase);
 }
 
-#elif defined(SOLARIS)
+#elif defined(SOLARIS) || defined(__sun) 
 
 JS_STATIC_ASSERT(JS_STACK_GROWTH_DIRECTION < 0);