diff --git a/common/config b/common/config
index c97facf8..cacd815c 100644
--- a/common/config
+++ b/common/config
@@ -316,8 +316,8 @@ _mount_opts()
 		export MOUNT_OPTIONS="-o acl $GFS2_MOUNT_OPTIONS"
 		;;
 	tmpfs)
-		# We need to specify the size at mount, use 512 MB by default
-		export MOUNT_OPTIONS="-o size=512M $TMPFS_MOUNT_OPTIONS"
+		# We need to specify the size at mount, use 1G by default
+		export MOUNT_OPTIONS="-o size=1G $TMPFS_MOUNT_OPTIONS"
 		;;
 	*)
 		;;