diff --git a/os/run/demo.run b/os/run/demo.run
index d17735f5db..7ba13ec89d 100644
--- a/os/run/demo.run
+++ b/os/run/demo.run
@@ -80,7 +80,7 @@ append_if [have_spec ps2] config {
 
 append_if [expr ![have_spec ps2] && [have_spec usb]] config {
 	<start name="usb_drv">
-		<resource name="RAM" quantum="3M"/>
+		<resource name="RAM" quantum="6M"/>
 		<provides><service name="Input"/></provides>
 		<config> <hid/> </config>
 	</start> }