diff --git a/compiler/forget/src/HIR/BuildHIR.ts b/compiler/forget/src/HIR/BuildHIR.ts
index a2bd83581f..c994aae9e5 100644
--- a/compiler/forget/src/HIR/BuildHIR.ts
+++ b/compiler/forget/src/HIR/BuildHIR.ts
@@ -21,8 +21,8 @@ import {
   Place,
   ReturnTerminal,
   SourceLocation,
-  Terminal,
   ThrowTerminal,
+  Type,
 } from "./HIR";
 import HIRBuilder, { Environment } from "./HIRBuilder";
 import todo, { todoInvariant } from "./todo";
@@ -83,6 +83,7 @@ export function lower(
       memberPath: null,
       effect: Effect.Unknown,
       loc: param.loc ?? GeneratedSource,
+      type: Type.Any,
     };
     params.push(place);
   });
@@ -890,6 +891,7 @@ function lowerExpression(
             memberPath: null,
             effect: Effect.Unknown,
             loc: left.loc,
+            type: Type.Any,
           };
           builder.push({
             id: makeInstructionId(0),
@@ -908,6 +910,7 @@ function lowerExpression(
             memberPath: null,
             effect: Effect.Unknown,
             loc: left.loc,
+            type: Type.Any,
           };
           builder.push({
             id: makeInstructionId(0),
@@ -1006,6 +1009,7 @@ function lowerExpression(
         memberPath: [...(object.memberPath ?? []), property.node.name],
         effect: Effect.Unknown,
         loc: exprLoc,
+        type: Type.Any,
       };
       return place;
     }
@@ -1082,6 +1086,7 @@ function lowerConditional(
     memberPath: null,
     effect: Effect.Read,
     loc,
+    type: Type.Any,
   };
   //  Block for code following the if
   const continuationBlock = builder.reserve();
@@ -1153,6 +1158,7 @@ function lowerJsxElementName(
       memberPath: null,
       effect: Effect.Unknown,
       loc: exprLoc,
+      type: Type.Any,
     };
     return place;
   } else {
@@ -1162,6 +1168,7 @@ function lowerJsxElementName(
       memberPath: null,
       effect: Effect.Unknown,
       loc: exprLoc,
+      type: Type.Any,
     };
     builder.push({
       id: makeInstructionId(0),
@@ -1202,6 +1209,7 @@ function lowerJsxElement(
       memberPath: null,
       effect: Effect.Unknown,
       loc: exprLoc,
+      type: Type.Any,
     };
     builder.push({
       id: makeInstructionId(0),
@@ -1225,6 +1233,7 @@ function lowerJsxElement(
       memberPath: null,
       effect: Effect.Unknown,
       loc: exprLoc,
+      type: Type.Any,
     };
     builder.push({
       id: makeInstructionId(0),
@@ -1255,6 +1264,7 @@ function lowerExpressionToPlace(
     memberPath: null,
     effect: Effect.Unknown,
     loc: exprLoc,
+    type: Type.Any,
   };
   builder.push({
     id: makeInstructionId(0),
@@ -1303,6 +1313,7 @@ function lowerLVal(builder: HIRBuilder, exprPath: NodePath<t.LVal>): Place {
         memberPath: null,
         effect: Effect.Unknown,
         loc: exprLoc,
+        type: Type.Any,
       };
       return place;
     }
@@ -1322,6 +1333,7 @@ function lowerLVal(builder: HIRBuilder, exprPath: NodePath<t.LVal>): Place {
         memberPath: [...(object.memberPath ?? []), propertyPath.node.name],
         effect: Effect.Unknown,
         loc: exprLoc,
+        type: Type.Any,
       };
       return place;
     }
diff --git a/compiler/forget/src/HIR/HIR.ts b/compiler/forget/src/HIR/HIR.ts
index 3b10a356c6..4cb4bc2384 100644
--- a/compiler/forget/src/HIR/HIR.ts
+++ b/compiler/forget/src/HIR/HIR.ts
@@ -270,6 +270,7 @@ export type Place = {
   memberPath: Array<string> | null;
   effect: Effect;
   loc: SourceLocation;
+  type: Type;
 };
 
 /**
@@ -398,3 +399,7 @@ export function makeInstructionId(id: number): InstructionId {
   );
   return id as InstructionId;
 }
+
+export enum Type {
+  Any,
+}
diff --git a/compiler/forget/src/HIR/InferReferenceEffects.ts b/compiler/forget/src/HIR/InferReferenceEffects.ts
index 353c01e561..c0c1dd88df 100644
--- a/compiler/forget/src/HIR/InferReferenceEffects.ts
+++ b/compiler/forget/src/HIR/InferReferenceEffects.ts
@@ -16,6 +16,7 @@ import {
   InstructionValue,
   Phi,
   Place,
+  Type,
   ValueKind,
 } from "./HIR";
 import { printMixedHIR, printPlace, printSourceLocation } from "./PrintHIR";
@@ -77,6 +78,7 @@ export default function inferReferenceEffects(fn: HIRFunction) {
     identifier: fn.id as any,
     loc: fn.loc,
     effect: Effect.Freeze,
+    type: Type.Any,
   };
   const value: InstructionValue = {
     kind: "Primitive",
diff --git a/compiler/forget/src/HIR/LeaveSSA.ts b/compiler/forget/src/HIR/LeaveSSA.ts
index 81a1d17334..0f8fb49870 100644
--- a/compiler/forget/src/HIR/LeaveSSA.ts
+++ b/compiler/forget/src/HIR/LeaveSSA.ts
@@ -16,6 +16,7 @@ import {
   makeInstructionId,
   Phi,
   Place,
+  Type,
 } from "./HIR";
 import { eachInstructionValueOperand, eachTerminalOperand } from "./visitors";
 
@@ -153,6 +154,7 @@ export function leaveSSA(fn: HIRFunction) {
             identifier,
             effect: Effect.Mutate,
             loc: GeneratedSource,
+            type: Type.Any,
           },
           kind: InstructionKind.Let,
         },