diff --git a/liteeth/mac/sram.py b/liteeth/mac/sram.py
index 61ceed1..78a54cd 100644
--- a/liteeth/mac/sram.py
+++ b/liteeth/mac/sram.py
@@ -263,7 +263,7 @@ class LiteEthMACSRAMReader(Module, AutoCSR):
 
         if timestamp is not None:
             # Latch Timestamp on start of outgoing packet.
-            self.sync == If(start, stat_fifo.sink.timestamp.eq(timestamp))
+            self.sync += If(start, stat_fifo.sink.timestamp.eq(timestamp))
             self.comb += stat_fifo.sink.valid.eq(fsm.ongoing("END")),
             self.comb += stat_fifo.sink.slot.eq(cmd_fifo.source.slot)
             # Trigger event when Status FIFO has contents.