diff --git a/Source/CPack/cmCPackPKGGenerator.cxx b/Source/CPack/cmCPackPKGGenerator.cxx
index bdda386606..9401bca5ca 100644
--- a/Source/CPack/cmCPackPKGGenerator.cxx
+++ b/Source/CPack/cmCPackPKGGenerator.cxx
@@ -225,7 +225,8 @@ void cmCPackPKGGenerator::CreateChoice(const cmCPackComponent& component,
     xout.Content(this->GetPackageName(component));
   } else {
     xout.Content("file:./");
-    xout.Content(relativePackageLocation);
+    xout.Content(cmSystemTools::EncodeURL(relativePackageLocation,
+                                          /*escapeSlashes=*/false));
   }
   xout.EndElement(); // pkg-ref
 }