diff --git a/web/ui/module/codemirror-promql/src/complete/promql.terms.ts b/web/ui/module/codemirror-promql/src/complete/promql.terms.ts
index 645b507855..7fb89bf062 100644
--- a/web/ui/module/codemirror-promql/src/complete/promql.terms.ts
+++ b/web/ui/module/codemirror-promql/src/complete/promql.terms.ts
@@ -317,10 +317,16 @@ export const functionIdentifierTerms = [
     info: 'Join together label values into new label',
     type: 'function',
   },
+  {
+    label: 'first_over_time',
+    detail: 'function',
+    info: 'Return the value of the oldest sample in the specified interval',
+    type: 'function',
+  },
   {
     label: 'last_over_time',
     detail: 'function',
-    info: 'The most recent point value in specified interval.',
+    info: 'Return the value of the most recent sample in the specified interval',
     type: 'function',
   },
   {
@@ -371,6 +377,12 @@ export const functionIdentifierTerms = [
     info: 'Return the timestamp of the minimum value over time for input series',
     type: 'function',
   },
+  {
+    label: 'ts_of_first_over_time',
+    detail: 'function',
+    info: 'Return the timestamp of the first value over time for input series',
+    type: 'function',
+  },
   {
     label: 'ts_of_last_over_time',
     detail: 'function',