1 files changed, 1 insertions, 1 deletions
diff --git a/pack.h b/pack.h
index a9b0ba4..c68b861 100644
--- a/pack.h
+++ b/pack.h
@@ -20,7 +20,7 @@ extern enum pack_trace {
 	PACK_TRACE_ALL,
 } pack_trace;
 
-enum pack_status unpack(void *buf, size_t size, const char *fmt, ...);
+enum pack_status unpack(const void *buf, size_t size, const char *fmt, ...);
 
 const char *pack_strerror(enum pack_status status);