diff --git a/launch/org.eclipse.cdt.launch/ChangeLog b/launch/org.eclipse.cdt.launch/ChangeLog
index 5bfb3bd1406..8aa63ec4182 100644
--- a/launch/org.eclipse.cdt.launch/ChangeLog
+++ b/launch/org.eclipse.cdt.launch/ChangeLog
@@ -1,3 +1,7 @@
+2004-08-10 Mikhail Khodjaiants
+	Fix for bug 70442: Debugger launch configuration not updating properly.
+	* AbstractCDebuggerTab.java
+
 2004-07-14 Mikhail Khodjaiants
 	Fix for bug 69977: TVT3.0: Non-externalized strings in Launching Debug.
 	Applied patch from Tanya Wollf.
diff --git a/launch/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/internal/ui/AbstractCDebuggerTab.java b/launch/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/internal/ui/AbstractCDebuggerTab.java
index 81d8e5c8e50..c3d47446f98 100644
--- a/launch/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/internal/ui/AbstractCDebuggerTab.java
+++ b/launch/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/internal/ui/AbstractCDebuggerTab.java
@@ -65,6 +65,7 @@ public abstract class AbstractCDebuggerTab extends CLaunchConfigurationTab {
 
 	protected void setLaunchConfiguration(ILaunchConfiguration launchConfiguration) {
 		fLaunchConfiguration = launchConfiguration;
+		setLaunchConfigurationWorkingCopy( null );
 	}
 
 	protected ILaunchConfiguration getLaunchConfiguration() {