diff --git a/src/platform/avr32/uip-conf.h b/src/platform/avr32/uip-conf.h
index 6a0aa325..d37b8ada 100644
--- a/src/platform/avr32/uip-conf.h
+++ b/src/platform/avr32/uip-conf.h
@@ -81,6 +81,7 @@ typedef unsigned short uip_stats_t;
 // UDP checksums on or off
 // (not currently supported ... should be 0)
 //
+// FIXME: Either above comment is wrong, or following should be 0
 #define UIP_CONF_UDP_CHECKSUMS      1
 
 //
diff --git a/src/platform/lm3s/uip-conf.h b/src/platform/lm3s/uip-conf.h
index 9a2f8661..8b031381 100644
--- a/src/platform/lm3s/uip-conf.h
+++ b/src/platform/lm3s/uip-conf.h
@@ -80,7 +80,7 @@ typedef unsigned short uip_stats_t;
 //
 // UDP checksums on or off
 // (not currently supported ... should be 0)
-//
+// FIXME: Either above comment is wrong, or following should be 0
 #define UIP_CONF_UDP_CHECKSUMS      1
 
 //
diff --git a/src/platform/stm32f4/uip-conf.h b/src/platform/stm32f4/uip-conf.h
index 9a2f8661..8c173e36 100644
--- a/src/platform/stm32f4/uip-conf.h
+++ b/src/platform/stm32f4/uip-conf.h
@@ -81,6 +81,7 @@ typedef unsigned short uip_stats_t;
 // UDP checksums on or off
 // (not currently supported ... should be 0)
 //
+// FIXME: Either above comment is wrong, or this should be 0
 #define UIP_CONF_UDP_CHECKSUMS      1
 
 //
diff --git a/src/platform/xmc4000/uip-conf.h b/src/platform/xmc4000/uip-conf.h
index 9a2f8661..fd430302 100644
--- a/src/platform/xmc4000/uip-conf.h
+++ b/src/platform/xmc4000/uip-conf.h
@@ -81,6 +81,7 @@ typedef unsigned short uip_stats_t;
 // UDP checksums on or off
 // (not currently supported ... should be 0)
 //
+// FIXME: Either above comment is wrong, or following should be 0
 #define UIP_CONF_UDP_CHECKSUMS      1
 
 //