diff --git a/src/system/libroot/posix/sys/mman.cpp b/src/system/libroot/posix/sys/mman.cpp
index 0c5eb2fba4..d194e40f97 100644
--- a/src/system/libroot/posix/sys/mman.cpp
+++ b/src/system/libroot/posix/sys/mman.cpp
@@ -216,7 +216,7 @@ shm_open(const char* name, int openMode, mode_t permissions)
 	if (error != B_OK)
 		RETURN_AND_SET_ERRNO(error);
 
-	return open(path, openMode | FD_CLOEXEC, permissions);
+	return open(path, openMode | O_CLOEXEC, permissions);
 }