diff --git a/src/structs.h b/src/structs.h
index 7c51c72..03c28e2 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -210,6 +210,8 @@
     int		wo_diff;
 # define w_p_diff w_onebuf_opt.wo_diff	// 'diff'
 #endif
+    char_u	*wo_eiw;
+# define w_p_eiw w_onebuf_opt.wo_eiw	// 'eventignorewin'
 #ifdef FEAT_FOLDING
     long	wo_fdc;
 # define w_p_fdc w_onebuf_opt.wo_fdc	// 'foldcolumn'