diff --git a/libcxxabi/src/cxa_guard_impl.h b/libcxxabi/src/cxa_guard_impl.h
--- a/libcxxabi/src/cxa_guard_impl.h
+++ b/libcxxabi/src/cxa_guard_impl.h
@@ -40,7 +40,6 @@
 #include "__cxxabi_config.h"
 #include "include/atomic_support.h"
 #include <unistd.h>
-#include <sys/types.h>
 #if defined(__has_include)
 # if __has_include(<sys/syscall.h>)
 #   include <sys/syscall.h>