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-rw-r--r--Modules/mmapmodule.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 467f110..cbb2452 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -32,8 +32,14 @@
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
+
+#ifndef MS_SYNC
+/* This is missing e.g. on SunOS 4.1.4 */
+#define MS_SYNC 0
#endif
+#endif /* UNIX */
+
#include <string.h>
#include <sys/types.h>