diff --git a/rtl/ibex_controller.sv b/rtl/ibex_controller.sv
index b80ec35d..20ee7d1a 100644
--- a/rtl/ibex_controller.sv
+++ b/rtl/ibex_controller.sv
@@ -357,7 +357,7 @@ module ibex_controller #(
 
     // No integrity checking on incoming load data so no internal interrupts
     assign irq_nm_int       = 1'b0;
-    assign irq_nm_int_cause = '0;
+    assign irq_nm_int_cause = NMI_INT_CAUSE_ECC;
     assign irq_nm_int_mtval = '0;
   end