diff --git a/mono/mini/debugger-agent.c b/mono/mini/debugger-agent.c
index d167406e0407..d2beb2379204 100644
--- a/mono/mini/debugger-agent.c
+++ b/mono/mini/debugger-agent.c
@@ -2717,11 +2717,13 @@ debugger_interrupt_critical (MonoThreadInfo *info, gpointer user_data)
 	MonoJitInfo *ji;
 
 	data->valid_info = TRUE;
-	ji = mono_jit_info_table_find_internal (
-			(MonoDomain *)mono_thread_info_get_suspend_state (info)->unwind_data [MONO_UNWIND_DATA_DOMAIN],
-			MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx),
-			TRUE,
-			TRUE);
+	MonoDomain *domain = (MonoDomain *) mono_thread_info_get_suspend_state (info)->unwind_data [MONO_UNWIND_DATA_DOMAIN];
+	if (!domain) {
+		/* not attached */
+		ji = NULL;
+	} else {
+		ji = mono_jit_info_table_find_internal ( domain, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx), TRUE, TRUE);
+	}
 
 	/* This is signal safe */
 	thread_interrupt (data->tls, info, ji);