diff --git a/packages/kbn-monaco/src/esql/lib/ast/definitions/functions.ts b/packages/kbn-monaco/src/esql/lib/ast/definitions/functions.ts
index 325fb7cfeae3c..8ffe574f91013 100644
--- a/packages/kbn-monaco/src/esql/lib/ast/definitions/functions.ts
+++ b/packages/kbn-monaco/src/esql/lib/ast/definitions/functions.ts
@@ -592,7 +592,7 @@ export const evalFunctionsDefinitions: FunctionDefinition[] = [
           { name: 'condition', type: 'boolean' },
           { name: 'value', type: 'any' },
         ],
-        minParams: 3,
+        minParams: 2,
         returnType: 'any',
         examples: [
           `from index | eval type = case(languages <= 1, "monolingual", languages <= 2, "bilingual", "polyglot")`,