diff --git a/src/Makevars b/src/Makevars
index d3e3f41..f18428c 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,14 +1,2 @@
-
-## With R 3.1.0 or later, you can uncomment the following line to tell R to 
-## enable compilation with C++11 (where available)
-##
-## Also, OpenMP support in Armadillo prefers C++11 support. However, for wider
-## availability of the package we do not yet enforce this here.  It is however
-## recommended for client packages to set it.
-##
-## And with R 3.4.0, and RcppArmadillo 0.7.960.*, we turn C++11 on as OpenMP
-## support within Armadillo prefers / requires it
-CXX_STD = CXX11
-
 PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) 
 PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
diff --git a/src/Makevars.win b/src/Makevars.win
index d3e3f41..f18428c 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,14 +1,2 @@
-
-## With R 3.1.0 or later, you can uncomment the following line to tell R to 
-## enable compilation with C++11 (where available)
-##
-## Also, OpenMP support in Armadillo prefers C++11 support. However, for wider
-## availability of the package we do not yet enforce this here.  It is however
-## recommended for client packages to set it.
-##
-## And with R 3.4.0, and RcppArmadillo 0.7.960.*, we turn C++11 on as OpenMP
-## support within Armadillo prefers / requires it
-CXX_STD = CXX11
-
 PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) 
 PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)