diff --git a/include/freerdp/utils/ringbuffer.h b/include/freerdp/utils/ringbuffer.h
index 099ba8ba1..1ec00c514 100644
--- a/include/freerdp/utils/ringbuffer.h
+++ b/include/freerdp/utils/ringbuffer.h
@@ -76,7 +76,7 @@ size_t ringbuffer_capacity(const RingBuffer *ringbuffer);
  * @param sz the size of the data to add
  * @return if the operation was successful, it could fail in case of OOM during realloc()
  */
-BOOL ringbuffer_write(RingBuffer *rb, const void *ptr, size_t sz);
+BOOL ringbuffer_write(RingBuffer *rb, const BYTE *ptr, size_t sz);
 
 
 /** ensures that we have sz bytes available at the write head, and return a pointer
diff --git a/libfreerdp/utils/ringbuffer.c b/libfreerdp/utils/ringbuffer.c
index 1611490dc..07e770164 100644
--- a/libfreerdp/utils/ringbuffer.c
+++ b/libfreerdp/utils/ringbuffer.c
@@ -131,7 +131,7 @@ static BOOL ringbuffer_realloc(RingBuffer *rb, size_t targetSize)
  * @param sz
  * @return
  */
-BOOL ringbuffer_write(RingBuffer *rb, const void *ptr, size_t sz)
+BOOL ringbuffer_write(RingBuffer *rb, const BYTE *ptr, size_t sz)
 {
 	size_t toWrite;
 	size_t remaining;