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-rw-r--r--channels/iax2.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/channels/iax2.h b/channels/iax2.h
index d579ed8aa..87e7bf398 100644
--- a/channels/iax2.h
+++ b/channels/iax2.h
@@ -218,7 +218,7 @@ enum iax_frame_subclass {
typedef int64_t iax2_format;
/*!\brief iax2 wrapper function for ast_getformatname */
-char *iax2_getformatname(iax2_format format);
+const char *iax2_getformatname(iax2_format format);
/*! Full frames are always delivered reliably */
struct ast_iax2_full_hdr {