diff --git a/channels/drdynvc/client/drdynvc_main.c b/channels/drdynvc/client/drdynvc_main.c
index 29111fde8..676dfb960 100644
--- a/channels/drdynvc/client/drdynvc_main.c
+++ b/channels/drdynvc/client/drdynvc_main.c
@@ -958,8 +958,8 @@ static UINT drdynvc_process_create_request(drdynvcPlugin* drdynvc, int Sp, int c
 
 	Stream_Write_UINT8(data_out, 0x10 | cbChId);
 	Stream_SetPosition(s, 1);
-	Stream_Copy(data_out, s, pos - 1);
-	
+	Stream_Copy(s, data_out, pos - 1);
+
 	if (channel_status == CHANNEL_RC_OK)
 	{
 		WLog_DBG(TAG, "channel created");
diff --git a/channels/tsmf/client/tsmf_ifman.c b/channels/tsmf/client/tsmf_ifman.c
index b4a84dfdb..4c9da7421 100644
--- a/channels/tsmf/client/tsmf_ifman.c
+++ b/channels/tsmf/client/tsmf_ifman.c
@@ -79,7 +79,7 @@ UINT tsmf_ifman_exchange_capability_request(TSMF_IFMAN* ifman)
 	if (!Stream_EnsureRemainingCapacity(ifman->output, ifman->input_size + 4))
 		return ERROR_OUTOFMEMORY;
 	pos = Stream_GetPosition(ifman->output);
-	Stream_Copy(ifman->output, ifman->input, ifman->input_size);
+	Stream_Copy(ifman->input, ifman->output, ifman->input_size);
 	Stream_SetPosition(ifman->output, pos);
 
 	if (Stream_GetRemainingLength(ifman->output) < 4)
diff --git a/libfreerdp/core/fastpath.c b/libfreerdp/core/fastpath.c
index 79fa00d6e..411d0e960 100644
--- a/libfreerdp/core/fastpath.c
+++ b/libfreerdp/core/fastpath.c
@@ -45,7 +45,7 @@
  * Fast-Path packet format is defined in [MS-RDPBCGR] 2.2.9.1.2, which revises
  * server output packets from the first byte with the goal of improving
  * bandwidth.
- * 
+ *
  * Slow-Path packet always starts with TPKT header, which has the first
  * byte 0x03, while Fast-Path packet starts with 2 zero bits in the first
  * two less significant bits of the first byte.
@@ -282,7 +282,7 @@ static int fastpath_recv_update(rdpFastPath* fastpath, BYTE updateCode, UINT32 s
 			if (!fastpath_recv_update_synchronize(fastpath, s))
 				WLog_ERR(TAG,  "fastpath_recv_update_synchronize failure but we continue");
 			else
-				IFCALL(update->Synchronize, context);			
+				IFCALL(update->Synchronize, context);
 			break;
 
 		case FASTPATH_UPDATETYPE_SURFCMDS:
@@ -463,7 +463,7 @@ static int fastpath_recv_update_data(rdpFastPath* fastpath, wStream* s)
 
 			Stream_SetPosition(fastpath->updateData, 0);
 
-			Stream_Copy(fastpath->updateData, cs, size);
+			Stream_Copy(cs, fastpath->updateData, size);
 		}
 		else if (fragmentation == FASTPATH_FRAGMENT_NEXT)
 		{
@@ -491,7 +491,7 @@ static int fastpath_recv_update_data(rdpFastPath* fastpath, wStream* s)
 				goto out_fail;
 			}
 
-			Stream_Copy(fastpath->updateData, cs, size);
+			Stream_Copy(cs, fastpath->updateData, size);
 		}
 		else if (fragmentation == FASTPATH_FRAGMENT_LAST)
 		{
@@ -519,7 +519,7 @@ static int fastpath_recv_update_data(rdpFastPath* fastpath, wStream* s)
 				goto out_fail;
 			}
 
-			Stream_Copy(fastpath->updateData, cs, size);
+			Stream_Copy(cs, fastpath->updateData, size);
 
 			Stream_SealLength(fastpath->updateData);
 			Stream_SetPosition(fastpath->updateData, 0);
@@ -546,7 +546,7 @@ static int fastpath_recv_update_data(rdpFastPath* fastpath, wStream* s)
 out_fail:
 
     if (cs != s) {
-        Stream_Release(cs);
+	Stream_Release(cs);
     }
 
     return -1;
diff --git a/libfreerdp/core/message.c b/libfreerdp/core/message.c
index 76e0a69a9..a56d1b58d 100644
--- a/libfreerdp/core/message.c
+++ b/libfreerdp/core/message.c
@@ -192,7 +192,7 @@ static BOOL update_message_SurfaceCommand(rdpContext* context, wStream* s)
 	if (!wParam)
 		return FALSE;
 
-	Stream_Copy(wParam, s, Stream_GetRemainingLength(s));
+	Stream_Copy(s, wParam, Stream_GetRemainingLength(s));
 	Stream_SetPosition(wParam, 0);
 
 	return MessageQueue_Post(context->update->queue, (void*) context,
diff --git a/winpr/include/winpr/stream.h b/winpr/include/winpr/stream.h
index 50f1aa904..7571a1380 100644
--- a/winpr/include/winpr/stream.h
+++ b/winpr/include/winpr/stream.h
@@ -240,7 +240,7 @@ static INLINE void Stream_Fill(wStream* _s, int _v, size_t _n)
 	Stream_Seek(_s, _n);
 }
 
-static INLINE void Stream_Copy(wStream* _dst, wStream* _src, size_t _n)
+static INLINE void Stream_Copy(wStream* _src, wStream* _dst, size_t _n)
 {
 	memcpy(_dst->pointer, _src->pointer, _n);
 	Stream_Seek(_dst, _n);