diff --git a/CHANGES.rst b/CHANGES.rst
index 7796b36df5..bcc8a4abd9 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,7 @@ Changelog
 2.6.0 (unreleased)
 ------------------
 
+- #2640 Fix missing custom transitions via adapter in Worksheet's analyses
 - #2639 Fix sampletype-related indexes for AnalysisSpec type are not indexed
 - #2638 Fix AttributeError on upgrade step 2654 (reindex_getDueDate)
 - #2569 Fix samples are indicated as late when Turnaround Time is zero
diff --git a/src/bika/lims/browser/worksheet/views/analyses.py b/src/bika/lims/browser/worksheet/views/analyses.py
index fdc97c33ce..bc79978794 100644
--- a/src/bika/lims/browser/worksheet/views/analyses.py
+++ b/src/bika/lims/browser/worksheet/views/analyses.py
@@ -162,15 +162,16 @@ def enable_remarks(self):
 
         # Inject custom transition for remarks
         if self.show_analysis_remarks_transition():
+            set_remarks = {
+                "id": "modal_set_analysis_remarks",
+                "title": _("Set remarks"),
+                "url": "{}/set_analysis_remarks_modal".format(
+                    api.get_url(self.context)),
+                "css_class": "btn btn-outline-secondary",
+                "help": _("Set remarks for selected analyses")
+            }
             for state in self.review_states:
-                state["custom_transitions"] = [{
-                    "id": "modal_set_analysis_remarks",
-                    "title": _("Set remarks"),
-                    "url": "{}/set_analysis_remarks_modal".format(
-                        api.get_url(self.context)),
-                    "css_class": "btn btn-outline-secondary",
-                    "help": _("Set remarks for selected analyses")
-                }]
+                state.setdefault("custom_transitions", []).append(set_remarks)
 
     @view.memoize
     def get_default_columns_order(self):