diff --git a/src/tiffcomposite_int.cpp b/src/tiffcomposite_int.cpp
index f0a5e678..163f01e3 100644
--- a/src/tiffcomposite_int.cpp
+++ b/src/tiffcomposite_int.cpp
@@ -1416,7 +1416,7 @@ size_t TiffImageEntry::doSizeData() const {
 size_t TiffDataEntry::doSizeData() const {
   if (!pValue())
     return 0;
-  return static_cast<uint32_t>(pValue()->sizeDataArea());
+  return pValue()->sizeDataArea();
 }
 
 size_t TiffSubIfd::doSizeData() const {
diff --git a/src/tiffcomposite_int.hpp b/src/tiffcomposite_int.hpp
index d2c04ed3..fa03f498 100644
--- a/src/tiffcomposite_int.hpp
+++ b/src/tiffcomposite_int.hpp
@@ -772,7 +772,7 @@ class TiffImageEntry : public TiffDataEntryBase {
 
  private:
   //! Pointers to the image data (strips) and their sizes.
-  using Strips = std::vector<std::pair<const byte*, uint32_t>>;
+  using Strips = std::vector<std::pair<const byte*, size_t>>;
 
   // DATA
   Strips strips_;  //!< Image strips data (never alloc'd) and sizes