diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/build/internal/core/scannerconfig/CfgDiscoveredPathManager.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/build/internal/core/scannerconfig/CfgDiscoveredPathManager.java
index 67c1b2d1417..b26fda2c063 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/build/internal/core/scannerconfig/CfgDiscoveredPathManager.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/build/internal/core/scannerconfig/CfgDiscoveredPathManager.java
@@ -189,6 +189,7 @@ public class CfgDiscoveredPathManager implements IResourceChangeListener {
 			return getCachedPathInfo(cInfo);
 		}
 		
+		cInfo.fLoadContext.getConfiguration().getRootFolderInfo().setExclude(false);
 		Map map = baseInfo.getSymbols();
 		IPath paths[] = baseInfo.getIncludePaths();