diff --git a/alliance/src/nero/src/Makefile.am b/alliance/src/nero/src/Makefile.am
index 8d37c653..2f48b131 100644
--- a/alliance/src/nero/src/Makefile.am
+++ b/alliance/src/nero/src/Makefile.am
@@ -1,7 +1,7 @@
 ## Process this file with automake to produce Makefile.in
 
 #CXXFLAGS        = -g -pg -O2 -std=c++11
-CXXFLAGS         = -g -O2 -std=c++11
+CXXFLAGS         = -g -O2 -std=gnu++11
 #CXXFLAGS        = -O2
 AM_CXXFLAGS      = @ALLIANCE_CFLAGS@ \
                    -I$(top_srcdir)/abl/src \