diff --git a/rtl/haiku/system.pp b/rtl/haiku/system.pp
index 19df391308..998c211406 100644
--- a/rtl/haiku/system.pp
+++ b/rtl/haiku/system.pp
@@ -360,7 +360,7 @@ begin
   { initialize handler                    }
   act.sa_mask[0] := 0;
   act.sa_handler := SigActionHandler(@SignalToRunError);
-  act.sa_flags := SA_ONSTACK or SA_SIGINFO;
+  act.sa_flags := SA_ONSTACK;
   FpSigAction(signum,@act,@oldact);
 end;