diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index b3906c1b98b7723dc698391b376cd2597d6f9327..dd2a8ade51919c6b59db4f8aa5574f8c022c363d 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1420,7 +1420,7 @@ func Test_expr_fails()
   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 c77d0bc7cdb862aafb57abb46b8fb03c38864f58..e362e270572e68b13c138200f907d47b09aebd50 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1156,
 /**/
     1155,
 /**/
diff --git a/src/vim9compile.c b/src/vim9compile.c
index c3c380852a9c6149ca45ed78732475f44ef52e44..07aacb37c07d456af7896f5649d1780b3fbc8560 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -7142,6 +7142,10 @@ compile_def_function(ufunc_T *ufunc, int set_return_type, cctx_T *outer_cctx)
 
 	    // 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;