diff --git a/update.sh b/update.sh
index 85a6dad..c07b3f8 100755
--- a/update.sh
+++ b/update.sh
@@ -85,15 +85,9 @@ done
 
 diff -ru --exclude='*.c' --exclude='*.cpp' --exclude='*.h' \
     ./ upgrade.tmp/${P} \
-    | grep -v '^Only in' \
     > upgrade.diff
-if [ $? -eq 2 ]
-then
-    print_failure "diff failed."
-    cleanup
-fi
 
-case $? in
+case "$?" in
 0)
     print_success "Already up to date."
     rm upgrade.diff