diff --git a/src/chipset/ali1543.c b/src/chipset/ali1543.c
index 42395b4064..67f7844a10 100644
--- a/src/chipset/ali1543.c
+++ b/src/chipset/ali1543.c
@@ -1662,6 +1662,7 @@ ali1543_init(const device_t *info)
     usb_param.pci_conf = dev->usb_conf;
     usb_param.pci_dev = &dev->usb_slot;
     usb_param.do_smi_raise = ali5237_usb_raise_smi;
+    usb_param.do_smi_ocr_raise = NULL;
     usb_param.do_pci_irq = ali5237_usb_pci_irq;
     usb_param.priv = dev;
     dev->usb = device_add_params(&usb_device, &usb_param);
diff --git a/src/chipset/intel_piix.c b/src/chipset/intel_piix.c
index 89f82d9a5a..859cfc5b00 100644
--- a/src/chipset/intel_piix.c
+++ b/src/chipset/intel_piix.c
@@ -1570,6 +1570,7 @@ piix_init(const device_t *info)
     params.do_smi_raise = piix_smsc_usb_smi_raise;
     params.priv = dev;
     params.do_pci_irq = 0;
+    params.do_smi_ocr_raise = NULL;
 
     dev->bm[0] = device_add_inst(&sff8038i_device, 1);
     dev->bm[1] = device_add_inst(&sff8038i_device, 2);
diff --git a/src/chipset/sis_5572_usb.c b/src/chipset/sis_5572_usb.c
index 241cd0f9ff..c44ad15d14 100644
--- a/src/chipset/sis_5572_usb.c
+++ b/src/chipset/sis_5572_usb.c
@@ -302,6 +302,7 @@ sis_5572_usb_init(UNUSED(const device_t *info))
     usb_param.pci_dev  = dev->sis->sb_southbridge_slot;
     usb_param.priv     = dev;
     usb_param.do_smi_raise = sis_5572_usb_smi_raise;
+    usb_param.do_smi_ocr_raise = NULL;
     usb_param.do_pci_irq = sis_5572_usb_pci_irq;
     dev->usb = device_add_params(&usb_device, &usb_param);
     ohci_register_usb(dev->usb);
diff --git a/src/chipset/stpc.c b/src/chipset/stpc.c
index db153bf005..6a9450ac94 100644
--- a/src/chipset/stpc.c
+++ b/src/chipset/stpc.c
@@ -920,7 +920,15 @@ stpc_init(const device_t *info)
     pci_add_card(PCI_ADD_NORTHBRIDGE, stpc_nb_read, stpc_nb_write, dev, &dev->nb_slot);
     pci_add_card(PCI_ADD_SOUTHBRIDGE, stpc_isab_read, stpc_isab_write, dev, &dev->sb_slot);
     if (dev->local == STPC_ATLAS) {
-        usb_params_t usb_params = { .pci_conf = dev->pci_conf[3], .pci_dev = &dev->usb_slot };
+        usb_params_t usb_params =
+        {
+            .pci_conf = dev->pci_conf[3],
+            .pci_dev = &dev->usb_slot,
+            .priv = dev,
+            .do_smi_ocr_raise = NULL,
+            .do_smi_raise = NULL,
+            .do_pci_irq = NULL
+        };
         pci_add_card(PCI_ADD_SOUTHBRIDGE_IDE, stpc_ide_read, stpc_ide_write, dev, &dev->ide_slot);
 
         dev->usb = device_add_params(&usb_device, &usb_params);
diff --git a/src/include/86box/usb.h b/src/include/86box/usb.h
index 52c37ba094..f48c4fd507 100644
--- a/src/include/86box/usb.h
+++ b/src/include/86box/usb.h
@@ -34,6 +34,8 @@ typedef struct usb_params_t {
     void* priv; /* The implementation. */
     /* Raises SMI with also setting implementation-specific bits. */
     void (*do_smi_raise)(void* priv);
+    /* Raises SMI with also setting implementation-specific bits (on OwnershipChangeRequest). */
+    void (*do_smi_ocr_raise)(void* priv);
     /* Asserts PCI interrupt. */
     void (*do_pci_irq)(void* priv, int level);
 } usb_params_t;
diff --git a/src/usb/usb_ohci_bochs.c b/src/usb/usb_ohci_bochs.c
index ea2eb0338d..b49b7cb44c 100644
--- a/src/usb/usb_ohci_bochs.c
+++ b/src/usb/usb_ohci_bochs.c
@@ -239,6 +239,7 @@ typedef struct {
   uint32_t ohci_mem_base;
 
   void (*do_smi_raise)(void *priv);
+  void (*do_smi_ocr_raise)(void *priv);
   void (*do_pci_irq)(void *priv, int level);
   void* card_priv;
 } bx_ohci_core_t;
@@ -884,8 +885,10 @@ void usb_ohci_mem_write(uint32_t addr, uint32_t value, void* priv)
         hub->op_regs.HcCommandStatus.ocr = 1;
         hub->op_regs.HcInterruptStatus |= 0x40000000;
         if ((hub->op_regs.HcInterruptEnable & 0xC0000000) == 0xC0000000) {
-          pclog("Assert SMI#\n");
-          if (hub->do_smi_raise && hub->card_priv)
+          ohci_log("Assert SMI#\n");
+          if (hub->do_smi_ocr_raise && hub->card_priv)
+            hub->do_smi_ocr_raise(hub->card_priv);
+          else if (hub->do_smi_raise && hub->card_priv)
             hub->do_smi_raise(hub->card_priv);
           else
             smi_raise();
@@ -1665,6 +1668,7 @@ usb_ohci_init(UNUSED(const device_t *info))
       hub->devfunc = usb_params->pci_dev;
       hub->pci_conf = usb_params->pci_conf;
       hub->do_smi_raise = usb_params->do_smi_raise;
+      hub->do_smi_ocr_raise = usb_params->do_smi_ocr_raise;
       hub->card_priv = usb_params->priv;
       hub->do_pci_irq = usb_params->do_pci_irq;
     }