diff --git a/src/structs.h b/src/structs.h
index 5ecb806..ac99e91 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1014,6 +1014,7 @@
 #ifdef FEAT_MBYTE
     vimconv_T	vir_conv;	/* encoding conversion */
 #endif
+    int		vir_version;	/* viminfo version detected or -1 */
     garray_T	vir_barlines;	/* lines starting with | */
 } vir_T;