diff --git a/src/radius/Makefile b/src/radius/Makefile
index 054331caa..32f572f72 100644
--- a/src/radius/Makefile
+++ b/src/radius/Makefile
@@ -10,7 +10,7 @@ install:
 
 include ../lib.rules
 
-#CFLAGS += -DCONFIG_IPV6
+CFLAGS += -DCONFIG_IPV6
 
 LIB_OBJS= \
 	radius.o \
diff --git a/src/utils/Makefile b/src/utils/Makefile
index 7cb8dc1bf..93f9f155f 100644
--- a/src/utils/Makefile
+++ b/src/utils/Makefile
@@ -11,6 +11,7 @@ install:
 include ../lib.rules
 
 #CFLAGS += -DWPA_TRACE
+CFLAGS += -DCONFIG_IPV6
 
 LIB_OBJS= \
 	base64.o \