diff --git a/libraries/common/src/main/java/androidx/media3/common/util/Util.java b/libraries/common/src/main/java/androidx/media3/common/util/Util.java
index 065528ff5c..f80525bdf6 100644
--- a/libraries/common/src/main/java/androidx/media3/common/util/Util.java
+++ b/libraries/common/src/main/java/androidx/media3/common/util/Util.java
@@ -2835,6 +2835,7 @@ public final class Util {
         "ji", "yi",
         // Individual macrolanguage codes mapped back to full macrolanguage code.
         // See https://en.wikipedia.org/wiki/ISO_639_macrolanguage
+        "arb", "ar-arb",
         "in", "ms-ind",
         "ind", "ms-ind",
         "nb", "no-nob",
diff --git a/libraries/common/src/test/java/androidx/media3/common/util/UtilTest.java b/libraries/common/src/test/java/androidx/media3/common/util/UtilTest.java
index db2900fa2a..1db8dca85a 100644
--- a/libraries/common/src/test/java/androidx/media3/common/util/UtilTest.java
+++ b/libraries/common/src/test/java/androidx/media3/common/util/UtilTest.java
@@ -1162,6 +1162,7 @@ public class UtilTest {
     assertThat(Util.normalizeLanguageCode("ara-ayl")).isEqualTo("ar-ayl");
 
     // Special case of short codes that are actually part of a macrolanguage.
+    assertThat(Util.normalizeLanguageCode("arb")).isEqualTo("ar-arb");
     assertThat(Util.normalizeLanguageCode("nb")).isEqualTo("no-nob");
     assertThat(Util.normalizeLanguageCode("nn")).isEqualTo("no-nno");
     assertThat(Util.normalizeLanguageCode("nob")).isEqualTo("no-nob");