diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 8218078b61333134d1b3fb2de3d273e75245c5ef..0cc182745e31fc3529e3528a16cc451df17fc0f1 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -233,7 +233,7 @@ module_exit(drm_core_exit);
 /**
  * Copy and IOCTL return string to user space
  */
-static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
+static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
 {
 	int len;