diff --git a/pdf.c b/pdf.c
index 55d77545a785b52046e27b815269bbe5750ea785..8f4fa53f554e3cdf6b23ec64ab81eb273c836ff2 100644
--- a/pdf.c
+++ b/pdf.c
@@ -775,7 +775,7 @@ validate_xrstm(HParseResult *p, void *u)
 	else if (bytes_eq(v->bytes, "XRef"))
 		return true;
 	return false;
-#endif
+#endif	// XXX this block can be removed
 
 	return (v != NULL && v->token_type == TT_BYTES &&
 	    bytes_eq(v->bytes, "XRef"));