diff --git a/openbsc/src/signal.c b/openbsc/src/signal.c
index 41352fb..bf5671e 100644
--- a/openbsc/src/signal.c
+++ b/openbsc/src/signal.c
@@ -39,9 +39,6 @@
 {
 	struct signal_handler *sig_data;
 
-	if (!tall_sigh_ctx)
-		tall_sigh_ctx = talloc_named_const(NULL, 1, "signal_handler");
-
 	sig_data = talloc(tall_sigh_ctx, struct signal_handler);
 	if (!sig_data)
 		return -ENOMEM;
@@ -84,3 +81,8 @@
 		(*handler->cbfn)(subsys, signal, handler->data, signal_data);
 	}
 }
+
+static __attribute__((constructor)) void on_dso_load_signal(void)
+{
+	tall_sigh_ctx = talloc_named_const(NULL, 1, "signal_handler");
+}