--- Makefile.orig	2017-03-27 16:11:23 UTC
+++ Makefile
@@ -33,7 +33,7 @@ INSTALL ?= install
 endif
 
 
-CFLAGS=-O2 -Wall -Werror -Wextra -pedantic -std=c90 -Ilib
+CFLAGS=-O2 -Wall -Werror -Wextra -pedantic -Ilib
 LDFLAGS=
 
 LT_CC:=$(LIBTOOL) --tag=CC --mode=compile $(CC)