diff --git a/arch/sim/src/sim/sim_doirq.c b/arch/sim/src/sim/sim_doirq.c
index a55b984e617..a84c90622cb 100644
--- a/arch/sim/src/sim/sim_doirq.c
+++ b/arch/sim/src/sim/sim_doirq.c
@@ -76,5 +76,5 @@ void *sim_doirq(int irq, void *context)
       sim_fullcontextrestore(regs);
     }
 
-  return regs;
+  return NULL;
 }