diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 4999563..5f79d9f 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -55,7 +55,9 @@
 #define DWC3_ENDPOINTS_NUM	32
 #define DWC3_XHCI_RESOURCES_NUM	2
 
-#define DWC3_EVENT_BUFFERS_SIZE	PAGE_SIZE
+#define DWC3_EVENT_SIZE		4	/* bytes */
+#define DWC3_EVENT_MAX_NUM	64	/* 2 events/endpoint */
+#define DWC3_EVENT_BUFFERS_SIZE	(DWC3_EVENT_SIZE * DWC3_EVENT_MAX_NUM)
 #define DWC3_EVENT_TYPE_MASK	0xfe
 
 #define DWC3_EVENT_TYPE_DEV	0