diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Binary.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Binary.java
index d0fed86f4e6..bfda27a9c37 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Binary.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/Binary.java
@@ -362,7 +362,7 @@ public class Binary extends Openable implements IBinary {
 							tu = new ExternalTranslationUnit(this, Path.fromOSString(filename), id);
 						}
 						else {
-							tu = new ExternalTranslationUnit(this, URIUtil.toURI(filename), id);						
+							tu = new ExternalTranslationUnit(this, URIUtil.toURI(filename, true), id);						
 						}
 					}