diff --git a/machine/minit.c b/machine/minit.c
index b8c9eac..903a382 100644
--- a/machine/minit.c
+++ b/machine/minit.c
@@ -133,7 +133,7 @@ static void hart_plic_init()
   for (size_t i = 0; i < ie_words; i++) {
      if (HLS()->plic_s_ie) {
         // Supervisor not always present
-        HLS()->plic_s_ie[i] = ULONG_MAX;
+        HLS()->plic_s_ie[i] = 0;
      }
   }
   *HLS()->plic_m_thresh = 1;