diff --git a/Sources/macSubtitleOCR/MKV/EBML/EBML.swift b/Sources/macSubtitleOCR/MKV/EBML/EBML.swift
index 89f06ba..48281a3 100644
--- a/Sources/macSubtitleOCR/MKV/EBML/EBML.swift
+++ b/Sources/macSubtitleOCR/MKV/EBML/EBML.swift
@@ -20,7 +20,6 @@ enum EBML {
     static let segmentID: UInt32 = 0x1853_8067
     static let simpleBlock: UInt32 = 0xA3
     static let timestamp: UInt32 = 0xE7
-    static let timestampScale: UInt32 = 0x2AD7B1
     static let tracksID: UInt32 = 0x1654_AE6B
     static let trackEntryID: UInt32 = 0xAE
     static let trackTypeID: UInt32 = 0x83
diff --git a/Sources/macSubtitleOCR/MKV/MKVHelpers.swift b/Sources/macSubtitleOCR/MKV/MKVHelpers.swift
index c3c4223..c89d18f 100644
--- a/Sources/macSubtitleOCR/MKV/MKVHelpers.swift
+++ b/Sources/macSubtitleOCR/MKV/MKVHelpers.swift
@@ -36,7 +36,6 @@ func encodePTSForVobSub(from timestamp: UInt64) -> [UInt8] {
 
 // Calculate the absolute timestamp with 90 kHz accuracy
 func calculateAbsolutePTS(_ clusterTimestamp: Int64, _ blockTimestamp: Int64) -> UInt64 {
-    // The block timestamp is relative, so we add it to the cluster timestamp
     UInt64(clusterTimestamp + blockTimestamp) * 90
 }