diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/AddMemoryBlockDialog.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/AddMemoryBlockDialog.java
index 319d3bbafac..916c9788b6e 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/AddMemoryBlockDialog.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/AddMemoryBlockDialog.java
@@ -283,7 +283,7 @@ public class AddMemoryBlockDialog extends TrayDialog implements ModifyListener,
 			fExpressionInput.setFocus();
 		}
 		else {
-			fAddressRadio.setSelection(false);
+			fExpressionRadio.setSelection(false);
 			fAddressRadio.setSelection(true);
 			fAddressInput.setFocus();
 		}