diff --git a/src/tiff/libtiff/tif_ojpeg.c b/src/tiff/libtiff/tif_ojpeg.c
index 81b055cbdd..aafcd8979d 100644
--- a/src/tiff/libtiff/tif_ojpeg.c
+++ b/src/tiff/libtiff/tif_ojpeg.c
@@ -217,6 +217,10 @@ static const TIFFField ojpegFields[] = {
 #include "jpeglib.h"
 #include "jerror.h"
 
+#ifndef HAVE_WXJPEG_BOOLEAN
+   typedef boolean wxjpeg_boolean;
+#endif
+
 typedef struct jpeg_error_mgr jpeg_error_mgr;
 typedef struct jpeg_common_struct jpeg_common_struct;
 typedef struct jpeg_decompress_struct jpeg_decompress_struct;
@@ -410,9 +414,9 @@ static void jpeg_encap_unwind(TIFF* tif);
 static void OJPEGLibjpegJpegErrorMgrOutputMessage(jpeg_common_struct* cinfo);
 static void OJPEGLibjpegJpegErrorMgrErrorExit(jpeg_common_struct* cinfo);
 static void OJPEGLibjpegJpegSourceMgrInitSource(jpeg_decompress_struct* cinfo);
-static boolean OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo);
+static wxjpeg_boolean OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo);
 static void OJPEGLibjpegJpegSourceMgrSkipInputData(jpeg_decompress_struct* cinfo, long num_bytes);
-static boolean OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired);
+static wxjpeg_boolean OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired);
 static void OJPEGLibjpegJpegSourceMgrTermSource(jpeg_decompress_struct* cinfo);
 
 int
@@ -2442,7 +2446,7 @@ OJPEGLibjpegJpegSourceMgrInitSource(jpeg_decompress_struct* cinfo)
 	(void)cinfo;
 }
 
-static boolean
+static wxjpeg_boolean
 OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo)
 {
 	TIFF* tif=(TIFF*)cinfo->client_data;
@@ -2468,7 +2472,7 @@ OJPEGLibjpegJpegSourceMgrSkipInputData(jpeg_decompress_struct* cinfo, long num_b
 	jpeg_encap_unwind(tif);
 }
 
-static boolean
+static wxjpeg_boolean
 OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired)
 {
 	TIFF* tif=(TIFF*)cinfo->client_data;