diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CProjectDescription.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CProjectDescription.java
index 1a8cdef02b8..e798815229e 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CProjectDescription.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CProjectDescription.java
@@ -451,6 +451,12 @@ public class CProjectDescription implements ICProjectDescription, ICDataProxyCon
 		if(fIsModified)
 			return true;
 		
+		if(fActiveCfgInfo.fIsModified)
+			return true;
+
+		if(fSettingCfgInfo.fIsModified)
+			return true;
+
 		if(fPrefs.isModified())
 			return true;