diff --git a/src/librtlsdr.c b/src/librtlsdr.c
index aa6c28b..96e7c75 100644
--- a/src/librtlsdr.c
+++ b/src/librtlsdr.c
@@ -1793,8 +1793,6 @@ static int _rtlsdr_alloc_async_buffers(rtlsdr_dev_t *dev)
 static int _rtlsdr_free_async_buffers(rtlsdr_dev_t *dev)
 {
 	unsigned int i;
-	fprintf(stderr, "free async buffers!\n");
-
 	if (!dev)
 		return -1;
 
@@ -1825,7 +1823,6 @@ static int _rtlsdr_free_async_buffers(rtlsdr_dev_t *dev)
 int rtlsdr_read_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx,
 			  uint32_t buf_num, uint32_t buf_len)
 {
-	fprintf(stderr, "started async transfer!\n");
 	unsigned int i;
 	int r = 0;
 	struct timeval tv = { 1, 0 };
@@ -1929,7 +1926,6 @@ int rtlsdr_read_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx,
 
 int rtlsdr_cancel_async(rtlsdr_dev_t *dev)
 {
-    fprintf(stderr, "Cancel rtlsdr async transfer!\n");
 	if (!dev)
 		return -1;