diff --git a/src/MAKE/Makefile.mpi b/src/MAKE/Makefile.mpi
index 22af569601..db134de68a 100644
--- a/src/MAKE/Makefile.mpi
+++ b/src/MAKE/Makefile.mpi
@@ -7,7 +7,7 @@ SHELL = /bin/sh
 # specify flags and libraries needed for your compiler
 
 CC =		mpicxx
-CCFLAGS =	-g -O3 -std=c++11
+CCFLAGS =	-g -O3
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M
 
diff --git a/src/MAKE/Makefile.serial b/src/MAKE/Makefile.serial
index df9392dc8e..a0b2959c4b 100644
--- a/src/MAKE/Makefile.serial
+++ b/src/MAKE/Makefile.serial
@@ -7,7 +7,7 @@ SHELL = /bin/sh
 # specify flags and libraries needed for your compiler
 
 CC =		g++
-CCFLAGS =	-g -O3 -std=c++11
+CCFLAGS =	-g -O3
 SHFLAGS =	-fPIC
 DEPFLAGS =	-M