diff --git a/Makefile.conf b/Makefile.conf
index f32ac26..6eeb044 100644
--- a/Makefile.conf
+++ b/Makefile.conf
@@ -11,7 +11,7 @@ TARGET=libpEpCxx11.a
 DEBUG=1
 PREFIX?=$(HOME)
 LANG_VERSION=c++11
-CXXFLAGS+=-fPIC -Wall -Wextra -ansi -pedantic
+CXXFLAGS+=-fPIC -Wall -Wextra -pedantic
 
 ifneq (,$(findstring g++,$(CXX)))
     CXXFLAGS+=-fdiagnostics-color=always