diff --git a/include/tesseract/renderer.h b/include/tesseract/renderer.h
index 25af9f468d..6f40523335 100644
--- a/include/tesseract/renderer.h
+++ b/include/tesseract/renderer.h
@@ -230,11 +230,11 @@ class TESS_API TessPDFRenderer : public TessResultRenderer {
   // PDFs one page at a time. At the end, that metadata is
   // used to make everything that isn't easily handled in a
   // streaming fashion.
-  long int obj_;                      // counter for PDF objects
-  std::vector<std::int64_t> offsets_; // offset of every PDF object in bytes
-  std::vector<long int> pages_;       // object number for every /Page object
-  std::string datadir_;               // where to find the custom font
-  bool textonly_;                     // skip images if set
+  long int obj_;                  // counter for PDF objects
+  std::vector<uint64_t> offsets_; // offset of every PDF object in bytes
+  std::vector<long int> pages_;   // object number for every /Page object
+  std::string datadir_;           // where to find the custom font
+  bool textonly_;                 // skip images if set
   // Bookkeeping only. DIY = Do It Yourself.
   void AppendPDFObjectDIY(size_t objectsize);
   // Bookkeeping + emit data.