diff --git a/ChangeLog b/ChangeLog
index 3a6905800..574c849d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-09-14  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* configure.ac: Disable emu-usb by default to prevent inadvertent
+	device takeover.
+
 2010-09-13  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Disable usbserial on grub-emu since our libusb code isn't good enough
diff --git a/configure.ac b/configure.ac
index e519fdd1a..10723987b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -698,8 +698,8 @@ if test x"$missing_ncurses" = xtrue ; then
   AC_MSG_ERROR([grub-emu can't be compiled without ncurses])
 fi
 
-if test x"$enable_grub_emu_usb" = xno ; then
-  grub_emu_usb_excuse="explicitly disabled"
+if test x"$enable_grub_emu_usb" != xyes ; then
+   grub_emu_usb_excuse="not enabled"
 fi
 
 if test x"$enable_grub_emu_pci" = xyes ; then