diff --git a/cran-comments.md b/cran-comments.md
index 8fefb7d..cffce45 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -17,4 +17,5 @@ i.e. gmvjoint.so has size 8.3Mb.
 R-hub build OK.
 Note upon installation one may be warned about inconsistencies across TMB/Matrix versions, but this
 is not within my control.
-Some warning about C++11 flags also, but this comes from RcppArmadillo, and not sure I can relax this.
\ No newline at end of file
+Commented warnings about CXX_STD=CXX11 in Makevars(/.win) which resulted in a NOTE. Hopefully this doesn't result
+in deterioration of performance since I thought RcppArmadillo required this!
\ No newline at end of file
diff --git a/src/Makevars b/src/Makevars
index d3e3f41..a04cb2c 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -8,7 +8,7 @@
 ##
 ## 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
+##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..a04cb2c 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -8,7 +8,7 @@
 ##
 ## 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
+##CXX_STD = CXX11
 
 PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) 
 PKG_LIBS = $(SHLIB_OPENMP_CXXFLAGS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)