diff --git a/hw/sun4m.c b/hw/sun4m.c
index 1d36f61..b983c75 100644
--- a/hw/sun4m.c
+++ b/hw/sun4m.c
@@ -516,7 +516,7 @@
         exit(1);
     }
 
-    main_esp = esp_init(hwdef->esp_base,
+    main_esp = esp_init(hwdef->esp_base, 2,
                         espdma_memory_read, espdma_memory_write,
                         espdma, *espdma_irq, esp_reset);
 
@@ -668,7 +668,7 @@
         exit(1);
     }
 
-    main_esp = esp_init(hwdef->esp_base,
+    main_esp = esp_init(hwdef->esp_base, 2,
                         espdma_memory_read, espdma_memory_write,
                         espdma, *espdma_irq, esp_reset);
 
@@ -1460,7 +1460,7 @@
         exit(1);
     }
 
-    main_esp = esp_init(hwdef->esp_base,
+    main_esp = esp_init(hwdef->esp_base, 2,
                         espdma_memory_read, espdma_memory_write,
                         espdma, *espdma_irq, esp_reset);