diff --git a/misoclib/com/liteeth/phy/__init__.py b/misoclib/com/liteeth/phy/__init__.py
index df9623aa9..1b1c354fd 100644
--- a/misoclib/com/liteeth/phy/__init__.py
+++ b/misoclib/com/liteeth/phy/__init__.py
@@ -4,6 +4,7 @@ from misoclib.com.liteeth.generic import *
 def LiteEthPHY(clock_pads, pads, **kwargs):
 	# Autodetect PHY
 	if hasattr(pads, "source_stb"):
+		# This is a simulation PHY
 		from misoclib.com.liteeth.phy.sim import LiteEthPHYSim
 		return LiteEthPHYSim(pads)
 	elif hasattr(clock_pads, "gtx") and flen(pads.tx_data) == 8:
@@ -16,6 +17,7 @@ def LiteEthPHY(clock_pads, pads, **kwargs):
 			from misoclib.com.liteeth.phy.gmii import LiteEthPHYGMII
 			return LiteEthPHYGMII(clock_pads, pads, **kwargs)
 	elif flen(pads.tx_data) == 4:
+		# This is a MII PHY
 		from misoclib.com.liteeth.phy.mii import LiteEthPHYMII
 		return LiteEthPHYMII(clock_pads, pads, **kwargs)
 	else: