diff --git a/arch/arm/src/lpc17xx/lpc17_ethernet.c b/arch/arm/src/lpc17xx/lpc17_ethernet.c
index 3b53d78a63..aa46f56996 100644
--- a/arch/arm/src/lpc17xx/lpc17_ethernet.c
+++ b/arch/arm/src/lpc17xx/lpc17_ethernet.c
@@ -61,6 +61,7 @@
 /* Does this chip have and ethernet controller? */
 
 #if LPC17_NETHCONTROLLERS > 0
+#warning "This driver has not yet been implemented"
 
 /****************************************************************************
  * Definitions