diff --git a/src/structs.h b/src/structs.h
index bf65d52..bc3d8cb 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -3034,6 +3034,7 @@
 #endif
     char_u	*b_p_kp;	// 'keywordprg'
     int		b_p_lisp;	// 'lisp'
+    char_u	*b_p_lop;	// 'lispoptions'
     char_u	*b_p_menc;	// 'makeencoding'
     char_u	*b_p_mps;	// 'matchpairs'
     int		b_p_ml;		// 'modeline'