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-rw-r--r--libstdc++-v3/include/tr1/math.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libstdc++-v3/include/tr1/math.h b/libstdc++-v3/include/tr1/math.h
index 423b5ea..99c8f45 100644
--- a/libstdc++-v3/include/tr1/math.h
+++ b/libstdc++-v3/include/tr1/math.h
@@ -29,6 +29,8 @@
#ifndef _GLIBCXX_TR1_MATH_H
#define _GLIBCXX_TR1_MATH_H 1
+#include <bits/requires_hosted.h> // TR1
+
#include <tr1/cmath>
#if _GLIBCXX_USE_C99_MATH_TR1