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-rw-r--r--chardev/char-null.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/chardev/char-null.c b/chardev/char-null.c
index 1c6a2900f9..89cb85da79 100644
--- a/chardev/char-null.c
+++ b/chardev/char-null.c
@@ -34,7 +34,7 @@ static void null_chr_open(Chardev *chr,
     *be_opened = false;
 }
 
-static void char_null_class_init(ObjectClass *oc, void *data)
+static void char_null_class_init(ObjectClass *oc, const void *data)
 {
     ChardevClass *cc = CHARDEV_CLASS(oc);