diff --git a/source/net/filebot/MediaTypes.properties b/source/net/filebot/MediaTypes.properties
index 21edbe78..832a0d04 100644
--- a/source/net/filebot/MediaTypes.properties
+++ b/source/net/filebot/MediaTypes.properties
@@ -31,7 +31,7 @@ video/mp4: mp4 m4v 3gp
 video/mov: mov
 video/divx: divx
 video/mpeg: mpg mpeg vob ts tp m2ts rec
-video/wmv: wmv asf wtv
+video/wmv: wmv asf wtv dvr-ms
 video/WebM: webm
 video/flash: flv
 video/realmedia: rm rmvb rmp4
diff --git a/source/net/filebot/util/FileUtilities.java b/source/net/filebot/util/FileUtilities.java
index 3ca92c1d..cbaec6d9 100644
--- a/source/net/filebot/util/FileUtilities.java
+++ b/source/net/filebot/util/FileUtilities.java
@@ -301,7 +301,7 @@ public final class FileUtilities {
 	 *
 	 * e.g. "file.txt" -> match "txt", ".hidden" -> no match
 	 */
-	public static final Pattern EXTENSION = Pattern.compile("(?<=.[.])\\p{Alnum}+$");
+	public static final Pattern EXTENSION = Pattern.compile("(?<=.[.])[\\p{Alnum}-]+$");
 	public static final String UNC_PREFIX = "\\\\";
 
 	public static String getExtension(File file) {