diff --git a/CHANGELOG.md b/CHANGELOG.md
index 299f4796..d657466d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 Always reference the ticket number at the end of the issue description.
 
+## Pending
+
+### Fixed
+
+- get_actions: formaction dictionary was updated directly as class attribute
 
 ## 1.3.1 (2018-07-03)
 
diff --git a/arctic/mixins.py b/arctic/mixins.py
index 75627aa2..85ca774b 100755
--- a/arctic/mixins.py
+++ b/arctic/mixins.py
@@ -188,7 +188,7 @@ def get_actions(self):  # noqa: C901
                         if action[2].get('style'):
                             allowed_action['custom_style'] = True
                         if action[2].get('form_action'):
-                            action[2]['form_action'] = self.in_modal(
+                            allowed_action['form_action'] = self.in_modal(
                                 reverse_url(action[2]['form_action'], obj))
                         allowed_action.update(action[2])