1 files changed, 2 insertions, 2 deletions

diff --git a/include/libimobiledevice/ostrace.h b/include/libimobiledevice/ostrace.h
index fb5a88f..f083ba7 100644
--- a/include/libimobiledevice/ostrace.h
+++ b/include/libimobiledevice/ostrace.h
@@ -86,10 +86,10 @@ struct ostrace_packet_header_t {
 #pragma pack(pop)
 
 /** Receives unparsed ostrace data from the ostrace service */
-typedef void (*ostrace_activity_cb_t)(const unsigned char* buf, unsigned int len, void *user_data);
+typedef void (*ostrace_activity_cb_t)(const void* buf, size_t len, void *user_data);
 
 /** Receives archive data from the ostrace service */
-typedef int (*ostrace_archive_write_cb_t)(const unsigned char* buf, unsigned int len, void *user_data);
+typedef int (*ostrace_archive_write_cb_t)(const void* buf, size_t len, void *user_data);
 
 /* Interface */