diff --git a/contrib/dialog/util.c b/contrib/dialog/util.c
index 992be3f433f5..726a36a5031d 100644
--- a/contrib/dialog/util.c
+++ b/contrib/dialog/util.c
@@ -39,6 +39,8 @@
 #endif
 
 #ifdef HAVE_SYS_PARAM_H
+#undef MIN
+#undef MAX
 #include <sys/param.h>
 #endif
 
diff --git a/gnu/lib/libdialog/Makefile b/gnu/lib/libdialog/Makefile
index 8c6b84b64f90..b97e4df9373a 100644
--- a/gnu/lib/libdialog/Makefile
+++ b/gnu/lib/libdialog/Makefile
@@ -15,7 +15,7 @@ MAN=		dialog.3
 
 LIBADD=		ncursesw m
 
-CFLAGS+= 	-I${.CURDIR} -I${DIALOG} -D_XOPEN_SOURCE_EXTENDED -Wno-macro-redefined
+CFLAGS+= 	-I${.CURDIR} -I${DIALOG} -D_XOPEN_SOURCE_EXTENDED
 .PATH:		${DIALOG}
 WARNS?=		1