1 files changed, 1 insertions, 1 deletions
diff --git a/src/data.c b/src/data.c
index 88ed31a14bb..96a713daf98 100644
--- a/src/data.c
+++ b/src/data.c
@@ -2714,7 +2714,7 @@ SIGTYPE
 arith_error (signo)
      int signo;
 {
-#ifdef USG
+#if defined(USG) && !defined(POSIX_SIGNALS)
   /* USG systems forget handlers when they are used;
      must reestablish each time */
   signal (signo, arith_error);