diff --git a/hw/esp.c b/hw/esp.c
index 0a8b3e4d8c5f556961c7196828c27440d3cb5e9c..c63f9936c7dcaa6606e6a3bb0a2ad642d70ad6f6 100644
--- a/hw/esp.c
+++ b/hw/esp.c
@@ -569,7 +569,7 @@ static CPUReadMemoryFunc *esp_mem_read[3] = {
 static CPUWriteMemoryFunc *esp_mem_write[3] = {
     esp_mem_writeb,
     NULL,
-    NULL,
+    esp_mem_writeb,
 };
 
 static void esp_save(QEMUFile *f, void *opaque)