diff --git a/ipc/shm.c b/ipc/shm.c
index 9eb1488..464694e 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -55,7 +55,7 @@
 #define shm_file_data(file) (*((struct shm_file_data **)&(file)->private_data))
 
 static const struct file_operations shm_file_operations;
-static struct vm_operations_struct shm_vm_ops;
+static const struct vm_operations_struct shm_vm_ops;
 
 #define shm_ids(ns)	((ns)->ids[IPC_SHM_IDS])
 
@@ -312,7 +312,7 @@
 	.get_unmapped_area	= shm_get_unmapped_area,
 };
 
-static struct vm_operations_struct shm_vm_ops = {
+static const struct vm_operations_struct shm_vm_ops = {
 	.open	= shm_open,	/* callback for a new vm-area open */
 	.close	= shm_close,	/* callback for when the vm-area is released */
 	.fault	= shm_fault,