diff --git a/patches/easy_crm_case_patch.rb b/patches/easy_crm_case_patch.rb
index 15b7595f..46215637 100644
--- a/patches/easy_crm_case_patch.rb
+++ b/patches/easy_crm_case_patch.rb
@@ -158,7 +158,7 @@ module RedmineDmsf
 end
 
 # Apply the patch
-if Redmine::Plugin.installed?('easy_crm')
+if defined?(EasyPatchManager)
   EasyPatchManager.register_model_patch 'EasyCrmCase', 'RedmineDmsf::Patches::EasyCrmCasePatch',
                                         if: -> { EasyPluginLoader.plugin_active? 'easy_crm_2_0' }
 end
diff --git a/patches/easy_crm_cases_controller_patch.rb b/patches/easy_crm_cases_controller_patch.rb
index 8179582d..9dbc2242 100644
--- a/patches/easy_crm_cases_controller_patch.rb
+++ b/patches/easy_crm_cases_controller_patch.rb
@@ -122,8 +122,9 @@ module RedmineDmsf
 end
 
 # Apply the patch
-if Redmine::Plugin.installed?('easy_crm')
+if defined?(EasyPatchManager)
   EasyPatchManager.register_controller_patch 'EasyCrmCasesController',
                                              'RedmineDmsf::Patches::EasyCrmCasesControllerPatch',
-                                             prepend: true
+                                             prepend: true,
+                                             if: -> { Redmine::Plugin.installed? 'easy_crm_2_0' }
 end