diff --git a/sound/oss/os.h b/sound/oss/os.h
index 0490562..a1a962d 100644
--- a/sound/oss/os.h
+++ b/sound/oss/os.h
@@ -43,4 +43,4 @@
 #undef PSEUDO_DMA_AUTOINIT
 #define ALLOW_BUFFER_MAPPING
 
-extern struct file_operations oss_sound_fops;
+extern const struct file_operations oss_sound_fops;