diff --git a/hgdriver/hgdev/hg_ipc.cpp b/hgdriver/hgdev/hg_ipc.cpp
index f396cb4..f5122c2 100644
--- a/hgdriver/hgdev/hg_ipc.cpp
+++ b/hgdriver/hgdev/hg_ipc.cpp
@@ -173,7 +173,7 @@ void shared_memory::init(void)
 	first_ = !(GetLastError() == ERROR_ALREADY_EXISTS);
 	obj_ = (void*)h;
 #else
-	int obj = shmget(key_, bytes_, IPC_EXCL | IPC_CREAT | 0600);
+	int obj = shmget(key_, bytes_, IPC_EXCL | IPC_CREAT | 0666);
 	if (obj < 0)
 	{
 		unsigned int* v = (unsigned int*)&key_;