diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/RawTextTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/RawTextTest.java
index 395fb7fed..e18d1c4eb 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/RawTextTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/RawTextTest.java
@@ -134,6 +134,25 @@ public class RawTextTest extends TestCase {
 		assertEquals(new Edit(2, 3, 2, 3), e);
 	}
 
+	public void testComparatorReduceCommonStartEnd_EmptyLine()
+			throws UnsupportedEncodingException {
+		RawText a;
+		RawText b;
+		Edit e;
+
+		a = new RawText("R\n y\n".getBytes("UTF-8"));
+		b = new RawText("S\n\n y\n".getBytes("UTF-8"));
+		e = new Edit(0, 2, 0, 3);
+		e = RawTextComparator.DEFAULT.reduceCommonStartEnd(a, b, e);
+		assertEquals(new Edit(0, 1, 0, 2), e);
+
+		a = new RawText("S\n\n y\n".getBytes("UTF-8"));
+		b = new RawText("R\n y\n".getBytes("UTF-8"));
+		e = new Edit(0, 3, 0, 2);
+		e = RawTextComparator.DEFAULT.reduceCommonStartEnd(a, b, e);
+		assertEquals(new Edit(0, 2, 0, 1), e);
+	}
+
 	private static RawText t(String text) {
 		StringBuilder r = new StringBuilder();
 		for (int i = 0; i < text.length(); i++) {
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/diff/RawTextComparator.java b/org.eclipse.jgit/src/org/eclipse/jgit/diff/RawTextComparator.java
index f9cf376ab..3576c5004 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/diff/RawTextComparator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/diff/RawTextComparator.java
@@ -303,8 +303,16 @@ public abstract class RawTextComparator extends SequenceComparator<RawText> {
 		e.beginB = findForwardLine(b.lines, e.beginB, bPtr);
 
 		e.endA = findReverseLine(a.lines, e.endA, aEnd);
+
+		final boolean partialA = aEnd < a.lines.get(e.endA + 1);
+		if (partialA)
+			bEnd += a.lines.get(e.endA + 1) - aEnd;
+
 		e.endB = findReverseLine(b.lines, e.endB, bEnd);
 
+		if (!partialA && bEnd < b.lines.get(e.endB + 1))
+			e.endA++;
+
 		return super.reduceCommonStartEnd(a, b, e);
 	}