diff --git a/packages/squiggle-lang/__tests__/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn_test.res b/packages/squiggle-lang/__tests__/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn_test.res
index 2fd2a976..1bb26e28 100644
--- a/packages/squiggle-lang/__tests__/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn_test.res
+++ b/packages/squiggle-lang/__tests__/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn_test.res
@@ -4,7 +4,7 @@ open Jest
 open Expect
 
 let expectEvalToBe = (expr: string, answer: string) =>
-  Reducer.eval(expr)->ExpressionValue.toStringResult->expect->toBe(answer)
+  Reducer.evaluate(expr)->ExpressionValue.toStringResult->expect->toBe(answer)
 
 describe("builtin", () => {
   // All MathJs operators and functions are available for string, number and boolean
diff --git a/packages/squiggle-lang/__tests__/Reducer/Reducer_TestHelpers.res b/packages/squiggle-lang/__tests__/Reducer/Reducer_TestHelpers.res
index 65f689cc..e6183ba0 100644
--- a/packages/squiggle-lang/__tests__/Reducer/Reducer_TestHelpers.res
+++ b/packages/squiggle-lang/__tests__/Reducer/Reducer_TestHelpers.res
@@ -8,4 +8,4 @@ let expectParseToBe = (expr: string, answer: string) =>
   Reducer.parse(expr)->Expression.toStringResult->expect->toBe(answer)
 
 let expectEvalToBe = (expr: string, answer: string) =>
-  Reducer.eval(expr)->ExpressionValue.toStringResult->expect->toBe(answer)
+  Reducer.evaluate(expr)->ExpressionValue.toStringResult->expect->toBe(answer)
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer.res
index bc5f496d..6e8dbdfa 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer.res
@@ -5,5 +5,5 @@ module Extra = Reducer_Extra
 module Js = Reducer_Js
 module MathJs = Reducer_MathJs
 
-let eval = Expression.eval
+let evaluate = Expression.eval
 let parse = Expression.parse
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer.resi b/packages/squiggle-lang/src/rescript/Reducer/Reducer.resi
index 65b2a62a..cf015a95 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer.resi
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer.resi
@@ -4,5 +4,7 @@ module Expression = Reducer_Expression
 module Extra = Reducer_Extra
 module Js = Reducer_Js
 module MathJs = Reducer_MathJs
-let eval: string => result<Expression.expressionValue, ErrorValue.errorValue>
+
+@genType
+let evaluate: string => result<Expression.expressionValue, ErrorValue.errorValue>
 let parse: string => result<Expression.expression, ErrorValue.errorValue>