diff --git a/libraries/extractor/src/main/java/androidx/media3/extractor/amr/AmrExtractor.java b/libraries/extractor/src/main/java/androidx/media3/extractor/amr/AmrExtractor.java
index d7a6e0ec1b..dac457063a 100644
--- a/libraries/extractor/src/main/java/androidx/media3/extractor/amr/AmrExtractor.java
+++ b/libraries/extractor/src/main/java/androidx/media3/extractor/amr/AmrExtractor.java
@@ -381,7 +381,6 @@ public final class AmrExtractor implements Extractor {
     }
 
     if ((flags & FLAG_ENABLE_CONSTANT_BITRATE_SEEKING) == 0
-        || inputLength == C.LENGTH_UNSET
         || (firstSampleSize != C.LENGTH_UNSET && firstSampleSize != currentSampleSize)) {
       seekMap = new SeekMap.Unseekable(C.TIME_UNSET);
       extractorOutput.seekMap(seekMap);
diff --git a/libraries/test_data/src/test/assets/extractordumps/amr/sample_nb_cbr.amr.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/amr/sample_nb_cbr.amr.unknown_length.dump
index 6cab18f874..59da50ae4d 100644
--- a/libraries/test_data/src/test/assets/extractordumps/amr/sample_nb_cbr.amr.unknown_length.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/amr/sample_nb_cbr.amr.unknown_length.dump
@@ -1,7 +1,7 @@
 seekMap:
   isSeekable = false
   duration = UNSET TIME
-  getPosition(0) = [[timeUs=0, position=0]]
+  getPosition(0) = [[timeUs=0, position=6]]
 numberOfTracks = 1
 track 0:
   total output bytes = 2834
diff --git a/libraries/test_data/src/test/assets/extractordumps/amr/sample_wb_cbr.amr.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/amr/sample_wb_cbr.amr.unknown_length.dump
index c4fb207a3a..0945d1f4a8 100644
--- a/libraries/test_data/src/test/assets/extractordumps/amr/sample_wb_cbr.amr.unknown_length.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/amr/sample_wb_cbr.amr.unknown_length.dump
@@ -1,7 +1,7 @@
 seekMap:
   isSeekable = false
   duration = UNSET TIME
-  getPosition(0) = [[timeUs=0, position=0]]
+  getPosition(0) = [[timeUs=0, position=9]]
 numberOfTracks = 1
 track 0:
   total output bytes = 4056