diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake-macos.yml
similarity index 100%
rename from .github/workflows/cmake.yml
rename to .github/workflows/cmake-macos.yml
diff --git a/cxx/mapped_file.cpp b/cxx/mapped_file.cpp
index 009babe..1b7b90a 100644
--- a/cxx/mapped_file.cpp
+++ b/cxx/mapped_file.cpp
@@ -278,7 +278,7 @@ void mapped_file_base::create(const path_type& p, size_t length) {
 
 	if (is_open()) close();
 
-	fd = ::open(p.c_str(), O_RDWR | O_CREAT | O_TRUNC);
+	fd = ::open(p.c_str(), O_RDWR | O_CREAT | O_TRUNC, 0666);
 	if (fd < 0) {
 		return set_or_throw_error(nullptr, "open");
 	}