diff --git a/examples/wget/target.c b/examples/wget/target.c
index e3c77a03a07..89716014c63 100644
--- a/examples/wget/target.c
+++ b/examples/wget/target.c
@@ -66,7 +66,7 @@
 #endif
 
 #ifndef CONFIG_EXAMPLE_WGET_DRIPADDR
-#  error "You must define "
+#  error "You must define CONFIG_EXAMPLE_WGET_DRIPADDR"
 #endif
 
 #ifndef CONFIG_EXAMPLE_WGET_NETMASK