diff --git a/src/unix/internal.h b/src/unix/internal.h
index 672fa3b0..35b3b8ca 100644
--- a/src/unix/internal.h
+++ b/src/unix/internal.h
@@ -45,6 +45,9 @@
 # include <CoreServices/CoreServices.h>
 #endif
 
+#define STATIC_ASSERT(expr)                                                   \
+  void uv__static_assert(int static_assert_failed[0 - !(expr)])
+
 #define ACCESS_ONCE(type, var)                                                \
   (*(volatile type*) &(var))