diff --git a/src/vim9execute.c b/src/vim9execute.c
index 22813e1..7a65be3 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -5571,7 +5571,7 @@
 		break;
 	    case ISN_LOADOUTER:
 		{
-		    if (iptr->isn_arg.number < 0)
+		    if (iptr->isn_arg.outer.outer_idx < 0)
 			smsg("%s%4d LOADOUTER level %d arg[%d]", pfx, current,
 				iptr->isn_arg.outer.outer_depth,
 				iptr->isn_arg.outer.outer_idx