diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/build/CBuildConfiguration.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/build/CBuildConfiguration.java
index e4ebbe6d4f4..92f5f8eb695 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/build/CBuildConfiguration.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/build/CBuildConfiguration.java
@@ -149,6 +149,7 @@ public abstract class CBuildConfiguration extends PlatformObject
 		Preferences settings = getSettings();
 		settings.put(TOOLCHAIN_TYPE, toolChain.getTypeId());
 		settings.put(TOOLCHAIN_ID, toolChain.getId());
+		settings.put(LAUNCH_MODE, launchMode);
 		try {
 			settings.flush();
 		} catch (BackingStoreException e) {