diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityRenameDetector.java b/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityRenameDetector.java
index 9ac94895b..5de7bac11 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityRenameDetector.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityRenameDetector.java
@@ -407,6 +407,7 @@ static long encode(int score, int srcIdx, int dstIdx) {
 				| encodeFile(dstIdx);
 	}
 
+	@SuppressWarnings("IntLongMath")
 	private static long encodeFile(int idx) {
 		// We invert the index so that the first file in the list sorts
 		// later in the table. This permits us to break ties favoring
@@ -415,6 +416,7 @@ private static long encodeFile(int idx) {
 		return INDEX_MASK - idx;
 	}
 
+	@SuppressWarnings("IntLongMath")
 	private static int decodeFile(int v) {
 		return INDEX_MASK - v;
 	}