diff --git a/sys/mips/conf/CI20 b/sys/mips/conf/CI20
index 0479e5e9fb4..f99daf57cac 100644
--- a/sys/mips/conf/CI20
+++ b/sys/mips/conf/CI20
@@ -4,6 +4,8 @@
 
 #NO_UNIVERSE
 
+# Note: SMP on 32-bit mips is no longer supported, which affects this config file.
+
 include		"JZ4780"
 ident		CI20
 
diff --git a/sys/mips/conf/JZ4780 b/sys/mips/conf/JZ4780
index c73ed9c789b..3b7369a9d47 100644
--- a/sys/mips/conf/JZ4780
+++ b/sys/mips/conf/JZ4780
@@ -4,6 +4,8 @@
 
 #NO_UNIVERSE
 
+# Note: SMP on 32-bit mips is no longer supported, which affects this config file.
+
 ident		JZ4780
 machine		mips mipselhf
 cpu		CPU_XBURST