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-rw-r--r--include/rtl-sdr.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/rtl-sdr.h b/include/rtl-sdr.h
index 83c45ec..f79a59c 100644
--- a/include/rtl-sdr.h
+++ b/include/rtl-sdr.h
@@ -62,7 +62,7 @@ RTLSDR_API int rtlsdr_reset_buffer(rtlsdr_dev_t *dev);
RTLSDR_API int rtlsdr_read_sync(rtlsdr_dev_t *dev, void *buf, int len, int *n_read);
-typedef void(*rtlsdr_async_read_cb_t)(const char *buf, uint32_t len, void *ctx);
+typedef void(*rtlsdr_async_read_cb_t)(unsigned char *buf, uint32_t len, void *ctx);
RTLSDR_API int rtlsdr_wait_async(rtlsdr_dev_t *dev, rtlsdr_async_read_cb_t cb, void *ctx);