diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Archive.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Archive.java
index 14a515fdf98..63226774fe0 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Archive.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Archive.java
@@ -31,7 +31,10 @@ public class Archive extends CFile implements IArchive {
 	}
 
 	public IBinary[] getBinaries() {
-		return (IBinary[])getChildren();
+		ICElement[] e = getChildren();
+		IBinary[] b = new IBinary[e.length];
+		System.arraycopy(e, 0, b, 0, e.length);
+		return b;
 	}
 
 	public CElementInfo createElementInfo() {
diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/CRoot.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/CRoot.java
index 8d573a8b6c7..46a8c62bd3b 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/CRoot.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/CRoot.java
@@ -29,7 +29,10 @@ public class CRoot extends CResource implements ICRoot {
 	}
 
 	public ICProject[] getCProjects() {
-		return (ICProject[])getChildren();
+		ICElement[] e = getChildren();
+		ICProject[] p = new ICProject[e.length];
+		System.arraycopy(e, 0, p, 0, e.length);
+		return p;
 	}
 
 	public IWorkspace getWorkspace() {