diff --git a/.idea/.gitignore b/.idea/.gitignore
index 6fb19b7..c21e354 100644
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@@ -9,3 +9,5 @@
 /inspectionProfiles
 # We use CMakePresets.json. Don't check in cmake profiles.
 /cmake.xml
+# Copilot
+copilot.*
diff --git a/include/qpdf/ObjectHandle.hh b/include/qpdf/ObjectHandle.hh
index 02b6674..e8f7a47 100644
--- a/include/qpdf/ObjectHandle.hh
+++ b/include/qpdf/ObjectHandle.hh
@@ -51,7 +51,7 @@ namespace qpdf
     // QPDFObjGen and bool.
     class BaseHandle
     {
-        friend class QPDF;
+        friend class ::QPDF;
 
       public:
         explicit inline operator bool() const;
diff --git a/include/qpdf/QPDFObjectHandle.hh b/include/qpdf/QPDFObjectHandle.hh
index 29b2494..e7c0922 100644
--- a/include/qpdf/QPDFObjectHandle.hh
+++ b/include/qpdf/QPDFObjectHandle.hh
@@ -43,7 +43,6 @@
 #include <qpdf/QPDFTokenizer.hh>
 
 class Pipeline;
-class QPDF;
 class QPDF_Array;
 class QPDF_Bool;
 class QPDF_Dictionary;