diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index b3906c1..dd2a8ad 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1420,7 +1420,7 @@
   call CheckDefFailure(["let x = '1'is2"], 'E488:')
   call CheckDefFailure(["let x = '1'isnot2"], 'E488:')
 
-  call CheckDefExecFailure(["CallMe ('yes')"], 'E492:')
+  call CheckDefFailure(["CallMe ('yes')"], 'E476:')
   call CheckDefFailure(["CallMe2('yes','no')"], 'E1069:')
   call CheckDefFailure(["CallMe2('yes' , 'no')"], 'E1068:')
 
diff --git a/src/version.c b/src/version.c
index c77d0bc..e362e27 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1156,
+/**/
     1155,
 /**/
     1154,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index c3c3808..07aacb3 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -7142,6 +7142,10 @@
 
 	    // TODO: other commands with an expression argument
 
+	    case CMD_SIZE:
+		    semsg(_("E476: Invalid command: %s"), ea.cmd);
+		    goto erret;
+
 	    default:
 		    // Not recognized, execute with do_cmdline_cmd().
 		    ea.arg = p;