diff --git a/py/dml/dmlparse.py b/py/dml/dmlparse.py
index dc582932..de461896 100644
--- a/py/dml/dmlparse.py
+++ b/py/dml/dmlparse.py
@@ -545,7 +545,11 @@ def object3(t):
               | maybe_extension GROUP     objident array_list maybe_istemplate object_spec
               | maybe_extension PORT      objident array_list maybe_istemplate object_spec
               | maybe_extension IMPLEMENT objident array_list maybe_istemplate object_spec'''
-    t[0] = ast.object_(site(t), t[3], t[2], t[4], t[1], t[5] + t[6])
+    array_spec = t[4]
+    if array_spec and t[2] in {'interface', 'implement'}:
+        report(ESYNTAX(site(t, 4), '[', f'{t[2]} array not allowed'))
+        array_spec = []
+    t[0] = ast.object_(site(t), t[3], t[2], array_spec, t[1], t[5] + t[6])
 
 @prod_dml14
 def object_subdevice(t):
diff --git a/test/1.4/errors/T_ESYNTAX.dml b/test/1.4/errors/T_ESYNTAX.dml
index 9290b7b7..8d930e03 100644
--- a/test/1.4/errors/T_ESYNTAX.dml
+++ b/test/1.4/errors/T_ESYNTAX.dml
@@ -86,6 +86,20 @@ if
 else
 { }
 
+extern typedef struct { void (*f)(conf_object_t *); } foo_interface_t;
+
+implement foo
+/// ERROR ESYNTAX
+    [
+        i < 3] {}
+
+connect c {
+  interface foo
+  /// ERROR ESYNTAX
+    [
+        i < 3];
+}
+
 method init() {
     local int a;
     local int b;