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-rw-r--r--res/res_musiconhold.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/res/res_musiconhold.c b/res/res_musiconhold.c
index 58894a1dc..c53bf29c1 100644
--- a/res/res_musiconhold.c
+++ b/res/res_musiconhold.c
@@ -187,7 +187,7 @@ static struct ao2_container *mohclasses;
static int reload(void);
#define mohclass_ref(class) (ao2_ref((class), +1), class)
-#define mohclass_unref(class) (ao2_ref((class), -1), NULL)
+#define mohclass_unref(class) (ao2_ref((class), -1), (struct mohclass *) NULL)
static void moh_files_release(struct ast_channel *chan, void *data)
{