diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 62dc93d..e4736a1 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -3956,6 +3956,10 @@ PostmasterStateMachine(void)
  * archive_recovery script, or SIGINT a script being run by a backend via
  * system().
  *
+ * SIGQUIT is a special case, in that the POSIX-spec default handling for
+ * it includes dumping core, which we don't really want for non-Postgres
+ * processes.  Hence, we send SIGINT not SIGQUIT to the process group.
+ *
  * There is a race condition for recently-forked children: they might not
  * have executed setsid() yet.  So we signal the child directly as well as
  * the group.  We assume such a child will handle the signal before trying
@@ -3972,12 +3976,15 @@ signal_child(pid_t pid, int signal)
 	{
 		case SIGINT:
 		case SIGTERM:
-		case SIGQUIT:
 		case SIGSTOP:
 		case SIGKILL:
 			if (kill(-pid, signal) < 0)
 				elog(DEBUG3, "kill(%ld,%d) failed: %m", (long) (-pid), signal);
 			break;
+		case SIGQUIT:
+			if (kill(-pid, SIGINT) < 0)
+				elog(DEBUG3, "kill(%ld,%d) failed: %m", (long) (-pid), SIGINT);
+			break;
 		default:
 			break;
 	}