diff --git a/libqpdf/QPDF_Stream.cc b/libqpdf/QPDF_Stream.cc
index c0fc2ef..44740df 100644
--- a/libqpdf/QPDF_Stream.cc
+++ b/libqpdf/QPDF_Stream.cc
@@ -197,44 +197,40 @@ Stream::copy() const
 }
 
 void
-QPDF::copyStreamData(QPDFObjectHandle result, QPDFObjectHandle foreign_oh)
+QPDF::copyStreamData(QPDFObjectHandle dest, QPDFObjectHandle source_oh)
 {
-    // This method was originally written for copying foreign streams, but it is used by
-    // Stream::copy to copy streams from the same QPDF object as well.
-
-    Dictionary dict = result.getDict();
-    Dictionary old_dict = foreign_oh.getDict();
-    QPDFObjGen local_og(result.getObjGen());
+    Dictionary dict = dest.getDict();
+    Dictionary old_dict = source_oh.getDict();
+    QPDFObjGen local_og(dest.getObjGen());
     // Copy information from the foreign stream so we can pipe its data later without keeping the
     // original QPDF object around.
 
-    QPDF& foreign_stream_qpdf =
-        foreign_oh.getQPDF("unable to retrieve owning qpdf from foreign stream");
+    QPDF& source_qpdf = source_oh.getQPDF("unable to retrieve owning qpdf from foreign stream");
 
-    Stream foreign = foreign_oh;
-    if (!foreign) {
+    Stream source = source_oh;
+    if (!source) {
         throw std::logic_error("unable to retrieve underlying stream object from foreign stream");
     }
-    std::shared_ptr<Buffer> stream_buffer = foreign.getStreamDataBuffer();
-    if (foreign_stream_qpdf.m->immediate_copy_from && !stream_buffer) {
+    std::shared_ptr<Buffer> stream_buffer = source.getStreamDataBuffer();
+    if (source_qpdf.m->immediate_copy_from && !stream_buffer) {
         // Pull the stream data into a buffer before attempting the copy operation. Do it on the
         // source stream so that if the source stream is copied multiple times, we don't have to
         // keep duplicating the memory.
-        foreign.replaceStreamData(
-            foreign.getRawStreamData(), old_dict["/Filter"], old_dict["/DecodeParms"]);
-        stream_buffer = foreign.getStreamDataBuffer();
+        source.replaceStreamData(
+            source.getRawStreamData(), old_dict["/Filter"], old_dict["/DecodeParms"]);
+        stream_buffer = source.getStreamDataBuffer();
     }
-    auto stream_provider = foreign.getStreamDataProvider();
+    auto stream_provider = source.getStreamDataProvider();
     if (stream_buffer) {
-        result.replaceStreamData(stream_buffer, dict["/Filter"], dict["/DecodeParms"]);
+        dest.replaceStreamData(stream_buffer, dict["/Filter"], dict["/DecodeParms"]);
     } else if (stream_provider) {
         // In this case, the remote stream's QPDF must stay in scope.
-        m->objects.streams().copier()->register_copy(local_og, foreign_oh);
-        result.replaceStreamData(
+        m->objects.streams().copier()->register_copy(local_og, source_oh);
+        dest.replaceStreamData(
             m->objects.streams().copier(), dict["/Filter"], dict["/DecodeParms"]);
     } else {
-        m->objects.streams().copier()->register_copy(local_og, foreign, foreign_oh.offset(), dict);
-        result.replaceStreamData(
+        m->objects.streams().copier()->register_copy(local_og, source, source.offset(), dict);
+        dest.replaceStreamData(
             m->objects.streams().copier(), dict["/Filter"], dict["/DecodeParms"]);
     }
 }