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-rw-r--r--configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 9b49f23e..18007357 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,6 +76,7 @@ case $host in
;;
*-*-darwin* )
AC_DEFINE([_POSIX_C_SOURCE], [200112L], [Needed to get clock_gettime on Mac OS X])
+ AC_DEFINE([_DARWIN_C_SOURCE], [200112L], [Needed to get NSIG on Mac OS X])
;;
esac