diff --git a/autogen/configure b/autogen/configure
index 833ef7bd6f1..6c7ef6bf42b 100755
--- a/autogen/configure
+++ b/autogen/configure
@@ -15332,7 +15332,7 @@ esac
 
 
 case $opsys in
-      aix4-2 | cygwin | gnu | irix6-5 | freebsd | netbsd | openbsd )
+      aix4-2 | cygwin | gnu | irix6-5 | freebsd | netbsd | openbsd | darwin )
     $as_echo "#define SIGNALS_VIA_CHARACTERS 1" >>confdefs.h
 
     ;;