diff -Nur a/Source/Metadata/XTIFF.cpp b/Source/Metadata/XTIFF.cpp
--- a/Source/Metadata/XTIFF.cpp	2023-02-13 11:08:06.161477974 +0800
+++ b/Source/Metadata/XTIFF.cpp	2023-02-13 11:15:35.831996396 +0800
@@ -749,7 +749,7 @@
 				continue;
 			}
 			// type of storage may differ (e.g. rationnal array vs float array type)
-			if((unsigned)_TIFFDataSize(tif_tag_type) != FreeImage_TagDataWidth(tag_type)) {
+			if((unsigned)TIFFFieldSetGetSize(fld) != FreeImage_TagDataWidth(tag_type)) {
 				// skip tag or _TIFFmemcpy will fail
 				continue;
 			}
