diff --git a/src/Makevars b/src/Makevars
index 6eb107b..22ebc63 100755
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,2 +1 @@
 PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
-CXX_STD = CXX11
diff --git a/src/Makevars.win b/src/Makevars.win
index 6eb107b..22ebc63 100755
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,2 +1 @@
 PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
-CXX_STD = CXX11