diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer.res
index d2e4858f..63e1f3a7 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer.res
@@ -5,8 +5,8 @@ module Extra = Reducer_Extra
 module Js = Reducer_Js
 module MathJs = Reducer_MathJs
 
-type expressionValue = Reducer_Expression.expressionValue
-type externalBindings = Expression.externalBindings
+type expressionValue = ReducerInterface_ExpressionValue.expressionValue
+type externalBindings = ReducerInterface_ExpressionValue.externalBindings
 let evaluate = Expression.eval
 let evaluateUsingExternalBindings = Expression.evalUsingExternalBindings
 let evaluatePartialUsingExternalBindings = Expression.evalPartialUsingExternalBindings