diff --git a/third_party/libtiff/tif_pixarlog.c b/third_party/libtiff/tif_pixarlog.c
index 29535d31e..80006d5b1 100644
--- a/third_party/libtiff/tif_pixarlog.c
+++ b/third_party/libtiff/tif_pixarlog.c
@@ -697,6 +697,9 @@ PixarLogSetupDecode(TIFF* tif)
        if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN)
                sp->user_datafmt = PixarLogGuessDataFmt(td);
        if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) {
+               _TIFFfree(sp->tbuf);
+               sp->tbuf = NULL;
+               sp->tbuf_size = 0;
                TIFFErrorExt(tif->tif_clientdata, module,
                        "PixarLog compression can't handle bits depth/data format combination (depth: %d)", 
                        td->td_bitspersample);
@@ -704,6 +707,9 @@ PixarLogSetupDecode(TIFF* tif)
        }
 
        if (inflateInit(&sp->stream) != Z_OK) {
+               _TIFFfree(sp->tbuf);
+               sp->tbuf = NULL;
+               sp->tbuf_size = 0;
                TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
                return (0);
        } else {