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-rw-r--r--Build/source/utils/asymptote/memory.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/Build/source/utils/asymptote/memory.h b/Build/source/utils/asymptote/memory.h
index 63c5291b130..70c36422ffe 100644
--- a/Build/source/utils/asymptote/memory.h
+++ b/Build/source/utils/asymptote/memory.h
@@ -18,7 +18,7 @@
#ifndef __GNUC_PREREQ
#define __GNUC_PREREQ(maj, min) (0)
# endif
-#if __GNUC_PREREQ(4,3)
+#if __GNUC_PREREQ(4,3) || defined(__CYGWIN__)
#include <tr1/unordered_map>
#define EXT std::tr1
#else