diff --git a/library/src/main/java/com/google/android/exoplayer/dash/mpd/MediaPresentationDescriptionParser.java b/library/src/main/java/com/google/android/exoplayer/dash/mpd/MediaPresentationDescriptionParser.java
index d0af28b9cf..cfdacc01d9 100644
--- a/library/src/main/java/com/google/android/exoplayer/dash/mpd/MediaPresentationDescriptionParser.java
+++ b/library/src/main/java/com/google/android/exoplayer/dash/mpd/MediaPresentationDescriptionParser.java
@@ -53,7 +53,7 @@ import java.util.regex.Pattern;
 public class MediaPresentationDescriptionParser extends DefaultHandler
     implements UriLoadable.Parser<MediaPresentationDescription> {
 
-  private static final Pattern FRAME_RATE_PATTERN = Pattern.compile("(\\d+)(?:/(\\d+))??");
+  private static final Pattern FRAME_RATE_PATTERN = Pattern.compile("(\\d+)(?:/(\\d+))?");
 
   private final String contentId;
   private final XmlPullParserFactory xmlParserFactory;