diff --git a/libtiff/tif_ojpeg.c b/libtiff/tif_ojpeg.c
index 5901cbd4..c2d814f0 100644
--- a/libtiff/tif_ojpeg.c
+++ b/libtiff/tif_ojpeg.c
@@ -658,7 +658,7 @@ static int
 OJPEGSetupDecode(TIFF* tif)
 {
 	static const char module[]="OJPEGSetupDecode";
-	TIFFWarningExt(tif->tif_clientdata,module,"Depreciated and troublesome old-style JPEG compression mode, please convert to new-style JPEG compression and notify vendor of writing software");
+	TIFFWarningExt(tif->tif_clientdata,module,"Deprecated and troublesome old-style JPEG compression mode, please convert to new-style JPEG compression and notify vendor of writing software");
 	return(1);
 }