--- a/configure
+++ b/configure
@@ -2583,7 +2583,7 @@ EOF
 				echo '#define TIFFSTRIPBYTECOUNTS uint32_t'
 				echo '#define TIFFVERSION TIFF_VERSION'
 				echo '#define TIFFHEADER TIFFHeader';;
-		4.[01234])	tiff_runlen_t="uint32_t"
+		4.[012345])	tiff_runlen_t="uint32_t"
 				tiff_offset_t="uint64_t"
 				echo '#define TIFFSTRIPBYTECOUNTS uint64_t'
 				echo '#define TIFFVERSION TIFF_VERSION_CLASSIC'