diff -Nru os-prober-1.61.orig/common.sh os-prober-1.61/common.sh
--- os-prober-1.61.orig/common.sh	2012-03-27 16:40:21.000000000 +0200
+++ os-prober-1.61/common.sh	2013-06-11 17:50:55.462903518 +0200
@@ -1,3 +1,5 @@
+. /etc/sysconfig/grub
+
 newns () {
   [ "$OS_PROBER_NEWNS" ] || exec /usr/lib/os-prober/newns "$0" "$@"
 }
diff -Nru os-prober-1.61.orig/os-probes/mounted/x86/05efi os-prober-1.61/os-probes/mounted/x86/05efi
--- os-prober-1.61.orig/os-probes/mounted/x86/05efi	2013-05-17 14:01:45.000000000 +0200
+++ os-prober-1.61/os-probes/mounted/x86/05efi	2013-06-11 17:51:09.340827559 +0200
@@ -8,7 +8,7 @@
 type="$3"
 
 # This file is for UEFI platform only
-if [ ! -d /sys/firmware/efi ]; then
+if [ ! -d /sys/firmware/efi -a ! "$GRUB_INSTALL_DEVICE_EFI" ]; then
 	debug "Not on UEFI platform"
 	exit 1
 fi
diff -Nru os-prober-1.61.orig/os-probes/mounted/x86/20microsoft os-prober-1.61/os-probes/mounted/x86/20microsoft
--- os-prober-1.61.orig/os-probes/mounted/x86/20microsoft	2013-05-14 22:05:55.000000000 +0200
+++ os-prober-1.61/os-probes/mounted/x86/20microsoft	2013-06-11 17:51:13.914802216 +0200
@@ -8,7 +8,7 @@
 type="$3"
 
 # This script looks for legacy BIOS bootloaders only. Skip if running UEFI
-if [ -d /sys/firmware/efi ]; then
+if [ -d /sys/firmware/efi -o "$GRUB_INSTALL_DEVICE_EFI" ]; then
 	debug "Skipping legacy bootloaders on UEFI system"
 	exit 1
 fi