diff --git a/libtiff/libtiff.def b/libtiff/libtiff.def
index ce36cfde..b62fdd08 100644
--- a/libtiff/libtiff.def
+++ b/libtiff/libtiff.def
@@ -114,6 +114,7 @@ EXPORTS TIFFOpen
 	_TIFFmemset
 	_TIFFmemcpy
 	_TIFFmemcmp
+	_TIFFCheckMalloc
 	TIFFCreateDirectory
 	TIFFSetTagExtender
 	TIFFFieldWithName