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-rw-r--r--boost/math/special_functions/lanczos.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/boost/math/special_functions/lanczos.hpp b/boost/math/special_functions/lanczos.hpp
index c9f4f90dcf..c1ff86930b 100644
--- a/boost/math/special_functions/lanczos.hpp
+++ b/boost/math/special_functions/lanczos.hpp
@@ -1284,7 +1284,7 @@ struct lanczos
} // namespace boost
#if !defined(_CRAYC) && !defined(__CUDACC__) && (!defined(__GNUC__) || (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 3)))
-#if (defined(_M_IX86_FP) && (_M_IX86_FP >= 2)) || defined(__SSE2__) || defined(_M_AMD64) || defined(_M_X64)
+#if ((defined(_M_IX86_FP) && (_M_IX86_FP >= 2)) || defined(__SSE2__) || defined(_M_AMD64) || defined(_M_X64)) && !defined(_MANAGED)
#include <boost/math/special_functions/detail/lanczos_sse2.hpp>
#endif
#endif