diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 59580fc..d3168c9 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -36,7 +36,9 @@
 #include "dma.h"
 #include "sysemu.h"
 
+#ifndef EHCI_DEBUG
 #define EHCI_DEBUG   0
+#endif
 
 #if EHCI_DEBUG
 #define DPRINTF printf