diff --git a/src/add-ons/kernel/busses/usb/ehci.cpp b/src/add-ons/kernel/busses/usb/ehci.cpp
index b1ec9e57c8..cebc5d27de 100644
--- a/src/add-ons/kernel/busses/usb/ehci.cpp
+++ b/src/add-ons/kernel/busses/usb/ehci.cpp
@@ -522,11 +522,15 @@ status_t
 EHCI::Start()
 {
 	TRACE("starting EHCI host controller\n");
-	TRACE("usbcmd: 0x%08lx; usbsts: 0x%08lx\n", ReadOpReg(EHCI_USBCMD), ReadOpReg(EHCI_USBSTS));
+	TRACE("usbcmd: 0x%08lx; usbsts: 0x%08lx\n", ReadOpReg(EHCI_USBCMD),
+		ReadOpReg(EHCI_USBSTS));
 
+	bool hasPerPortChangeEvent = (ReadCapReg32(EHCI_HCCPARAMS)
+		& EHCI_HCCPARAMS_PPCEC) != 0;
 	uint32 frameListSize = (ReadOpReg(EHCI_USBCMD) >> EHCI_USBCMD_FLS_SHIFT)
 		& EHCI_USBCMD_FLS_MASK;
 	WriteOpReg(EHCI_USBCMD, ReadOpReg(EHCI_USBCMD) | EHCI_USBCMD_RUNSTOP
+		| (hasPerPortChangeEvent ? EHCI_USBCMD_PPCEE : 0)
 		| EHCI_USBCMD_ASENABLE | EHCI_USBCMD_PSENABLE
 		| (frameListSize << EHCI_USBCMD_FLS_SHIFT)
 		| (1 << EHCI_USBCMD_ITC_SHIFT));
diff --git a/src/add-ons/kernel/busses/usb/ehci_hardware.h b/src/add-ons/kernel/busses/usb/ehci_hardware.h
index 4350e9567e..d01b513f94 100644
--- a/src/add-ons/kernel/busses/usb/ehci_hardware.h
+++ b/src/add-ons/kernel/busses/usb/ehci_hardware.h
@@ -31,11 +31,15 @@
 // USB Command Register (EHCI Spec 2.3.1)
 #define EHCI_USBCMD_ITC_SHIFT	16			// Interrupt Threshold Control
 #define EHCI_USBCMD_ITC_MASK	0xff
+#define EHCI_USBCMD_PPCEE		(1 << 15)	// Per-Port Change Events Enable
+#define EHCI_USBCMD_FSP			(1 << 14)	// Fully Synchronized Prefetch
+#define EHCI_USBCMD_ASPE		(1 << 13)	// Async Schedule Prefetch Enable
+#define EHCI_USBCMD_PSPE		(1 << 12)	// Periodic Schedule Prefetch Enable
 #define EHCI_USBCMD_ASPME		(1 << 11)	// Async Schedule Park Mode Enable
 #define EHCI_USBCMD_ASPMC_SHIFT	8			// Async Schedule Park Mode Count
 #define EHCI_USBCMD_ASPMC_MASK	0x03
 #define EHCI_USBCMD_LHCRESET	(1 << 7)	// Light Host Controller Reset
-#define EHCI_USBCMD_INTONAAD	(1 << 6)	// Interrupt on Async Advance Dorbell
+#define EHCI_USBCMD_INTONAAD	(1 << 6)	// Interrupt on Async Advance Doorbell
 #define EHCI_USBCMD_ASENABLE	(1 << 5)	// Asynchronous Schedule Enable
 #define EHCI_USBCMD_PSENABLE	(1 << 4)	// Periodic Schedule Enable
 #define EHCI_USBCMD_FLS_SHIFT	2			// Frame List Size
@@ -104,6 +108,10 @@
 #define EHCI_LEGSUP_OSOWNED		(1 << 24)	// OS Owned Semaphore
 #define EHCI_LEGSUP_BIOSOWNED	(1 << 16)	// BIOS Owned Semaphore
 
+#define EHCI_HCCPARAMS_FPLC		(1 << 19)	// 32 Frames Period List
+#define EHCI_HCCPARAMS_PPCEC	(1 << 18)	// Per-Port Change Event
+#define EHCI_HCCPARAMS_LPM		(1 << 17)	// Link Power Management
+#define EHCI_HCCPARAMS_HP		(1 << 16)	// Hardware Prefetch
 #define EHCI_HCCPARAMS_IPT_SHIFT	4		// Isochronous Periodic Threshold
 #define EHCI_HCCPARAMS_IPT_MASK	0xf