diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 0573897..692192b 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -2750,6 +2750,10 @@
 				if (*p == NUL || ends_excmd(*p))
 				    break;
 			    }
+			    // Avoid that "filter(arg)" is recognized.
+			    if (in_vim9script() && !VIM_ISWHITE(*p))
+				break;
+
 			    if (skip_only)
 				p = skip_vimgrep_pat(p, NULL, NULL);
 			    else
@@ -2904,7 +2908,7 @@
 }
 
 /*
- * Unod and free contents of "cmdmod".
+ * Undo and free contents of "cmdmod".
  */
     void
 undo_cmdmod(exarg_T *eap, int save_msg_scroll)
diff --git a/src/testdir/test_vim9_cmd.vim b/src/testdir/test_vim9_cmd.vim
index 801404d..676e97c 100644
--- a/src/testdir/test_vim9_cmd.vim
+++ b/src/testdir/test_vim9_cmd.vim
@@ -265,6 +265,12 @@
   endif
 enddef
 
+def Test_filter_is_not_modifier()
+  let tags = [{'a': 1, 'b': 2}, {'x': 3, 'y': 4}]
+  filter(tags, { _, v -> has_key(v, 'x') ? 1 : 0 })
+  assert_equal([#{x: 3, y: 4}], tags)
+enddef
+
 def Test_eval_command()
   let from = 3
   let to = 5
diff --git a/src/version.c b/src/version.c
index 4ffa17f..c01d105 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1178,
+/**/
     1177,
 /**/
     1176,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index e7f90e1..8905ee3 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -6963,6 +6963,7 @@
 	}
 	// TODO: use modifiers in the command
 	undo_cmdmod(&ea, save_msg_scroll);
+	CLEAR_FIELD(cmdmod);
 
 	// Skip ":call" to get to the function name.
 	if (checkforcmd(&ea.cmd, "call", 3))