diff --git a/hw/fdc.c b/hw/fdc.c
index 0ece6db2316594cad5125cdfa809cc5cbd9731b6..e5a650a2a9a34c6425128c3170ae310d515025a7 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -1878,9 +1878,8 @@ fdctrl_t *fdctrl_init_isa(int isairq, int dma_chann,
     fdctrl_t *fdctrl;
     ISADevice *dev;
 
-    dev = isa_create_simple("isa-fdc", io_base, 0);
+    dev = isa_create_simple("isa-fdc", io_base, 0, isairq, -1);
     fdctrl = &(DO_UPCAST(fdctrl_isabus_t, busdev, dev)->state);
-    isa_connect_irq(dev, 0, isairq);
 
     fdctrl->dma_chann = dma_chann;
     DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
diff --git a/hw/isa-bus.c b/hw/isa-bus.c
index 9561c3112f5fef6ffd604df7aeb747afb393f37d..ebcc081e97eb24b438b0ebb28d0a5be39329c321 100644
--- a/hw/isa-bus.c
+++ b/hw/isa-bus.c
@@ -121,7 +121,8 @@ void isa_qdev_register(ISADeviceInfo *info)
     qdev_register(&info->qdev);
 }
 
-ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2)
+ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2,
+                             uint32_t irq, uint32 irq2)
 {
     DeviceState *dev;
     ISADevice *isa;
@@ -135,6 +136,10 @@ ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2
     isa->iobase[0] = iobase;
     isa->iobase[1] = iobase2;
     qdev_init(dev);
+    if (-1 != irq)
+        isa_connect_irq(isa, 0, irq);
+    if (-1 != irq2)
+        isa_connect_irq(isa, 1, irq2);
     return isa;
 }
 
diff --git a/hw/isa.h b/hw/isa.h
index 31853a0402faf97a45ef9b266fc6cad175bd649c..872e3ef011d2658aa88cf562a9391ee3a593cb14 100644
--- a/hw/isa.h
+++ b/hw/isa.h
@@ -30,7 +30,8 @@ void isa_connect_irq(ISADevice *dev, int devirq, int isairq);
 qemu_irq isa_reserve_irq(int isairq);
 void isa_init_irq(ISADevice *dev, qemu_irq *p);
 void isa_qdev_register(ISADeviceInfo *info);
-ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2);
+ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2,
+                             uint32_t irq, uint32_t irq2);
 
 extern target_phys_addr_t isa_mem_base;
 
diff --git a/hw/pc.c b/hw/pc.c
index 915e69191687b50735e977fe2b72ac09699d021d..9dad10491c8743828153c2b9fd1614269a104194 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1376,9 +1376,7 @@ static void pc_init1(ram_addr_t ram_size,
         }
     }
 
-    isa_dev = isa_create_simple("i8042", 0x60, 0x64);
-    isa_connect_irq(isa_dev, 0, 1);
-    isa_connect_irq(isa_dev, 1, 12);
+    isa_dev = isa_create_simple("i8042", 0x60, 0x64, 1, 12);
     DMA_init(0);
 #ifdef HAS_AUDIO
     audio_init(pci_enabled ? pci_bus : NULL, isa_irq);