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-rw-r--r--libstdc++-v3/src/c++20/sstream-inst.cc4
1 files changed, 3 insertions, 1 deletions
diff --git a/libstdc++-v3/src/c++20/sstream-inst.cc b/libstdc++-v3/src/c++20/sstream-inst.cc
index b3fbd6e..55d1fe5 100644
--- a/libstdc++-v3/src/c++20/sstream-inst.cc
+++ b/libstdc++-v3/src/c++20/sstream-inst.cc
@@ -26,7 +26,9 @@
// ISO C++ 14882:
//
-// Instantiations in this file are only for the new SSO std::string ABI
+// Instantiations in this file are only for the new SSO std::string ABI.
+#define _GLIBCXX_USE_CXX11_ABI 1
+
#include <sstream>
#if _GLIBCXX_USE_CXX11_ABI