diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryPresentation.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryPresentation.java
index 736bbb299e8..8f67f40c683 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryPresentation.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryPresentation.java
@@ -335,7 +335,7 @@ public class MemoryPresentation
 				if (address.compareTo( firstRow.getAddress()) >=0 && address.compareTo( lastRow.getAddress()) <=0)
 				
 				{
-					BigInteger asciiOffset = address.distance( firstRow.getAddress());
+					BigInteger asciiOffset = firstRow.getAddress().distanceTo(address);
 					int asciiRowlength = getMemoryBlock().getWordSize() * getMemoryBlock().getNumberOfColumns();
 					int numberOfRows = asciiOffset.intValue()  / asciiRowlength;
 					int offsetInRow = asciiOffset.intValue()  % asciiRowlength;