diff --git a/xdg-sanity.sh b/xdg-sanity.sh
index 3030a4c..157f000 100755
--- a/xdg-sanity.sh
+++ b/xdg-sanity.sh
@@ -2,7 +2,7 @@
 
 echo "Determining MIME type of $1:"
 
-MIME=$(curl -I -s "$1" | sed -n -e 's/^content-type: //p' | sed -e 's/;.\+//g' | tr -d '\r')
+MIME=$(curl -I -s "$1" | sed -n -e 's/^[cC]ontent-[tT]ype: //p' | sed -e 's/;.\+//g' | tr -d '\r')
 
 echo $MIME