diff --git a/liteeth/frontend/stream.py b/liteeth/frontend/stream.py
index d02990d..21385d1 100644
--- a/liteeth/frontend/stream.py
+++ b/liteeth/frontend/stream.py
@@ -58,7 +58,11 @@ class LiteEthStream2UDPTX(LiteXModule):
                 source.ip_address.eq(ip_address),
                 source.length.eq(level * (data_width//8)),
                 source.data.eq(fifo.source.data),
-                source.last_be.eq({32:0b1000, 8:0b1}[data_width]),
+                source.last_be.eq({
+                    32 : 0b1000,
+                    16 : 0b10,
+                    8  : 0b1}[data_width]
+                ),
                 If(source.ready,
                     fifo.source.ready.eq(1),
                     NextValue(counter, counter + 1),