diff --git a/dlls/windowscodecs/tiffformat.c b/dlls/windowscodecs/tiffformat.c
index 3d53b2439a3..58cd04ef173 100644
--- a/dlls/windowscodecs/tiffformat.c
+++ b/dlls/windowscodecs/tiffformat.c
@@ -289,6 +289,7 @@ static HRESULT tiff_get_decode_info(TIFF *tiff, tiff_decode_info *decode_info)
     decode_info->reverse_bgr = 0;
     decode_info->invert_grayscale = 0;
     decode_info->tiled = 0;
+    decode_info->source_bpp = 0;
 
     ret = pTIFFGetField(tiff, TIFFTAG_PHOTOMETRIC, &photometric);
     if (!ret)