--- src/Makevars.in	2024-07-29 20:43:41.000000000 +0800
+++ src/Makevars.in	2024-08-08 11:13:27.000000000 +0800
@@ -3,7 +3,7 @@
 # Copyright 2008 - 2024  Dirk Eddelbuettel
 
 # See configure.in for how these variables are computed
-PKG_CXXFLAGS=@PKG_CXXFLAGS@ -I../inst/include -I. $(SHLIB_OPENMP_CXXFLAGS)
+PKG_CXXFLAGS=@PKG_CXXFLAGS@ -I../inst/include -I. -D_GLIBCXX_USE_CXX11_ABI=0 $(SHLIB_OPENMP_CXXFLAGS)
 PKG_LIBS=@PKG_LIBS@ $(SHLIB_OPENMP_CXXFLAGS)
 
 # Use C++14 with QuantLib 1.28 or later -- and the default with R 4.2.* anyway