diff --git a/compiler/forget/packages/playground/components/Editor/Output.tsx b/compiler/forget/packages/playground/components/Editor/Output.tsx
index 3214ab5edf..07ddfe04cf 100644
--- a/compiler/forget/packages/playground/components/Editor/Output.tsx
+++ b/compiler/forget/packages/playground/components/Editor/Output.tsx
@@ -20,6 +20,7 @@ const {
   enterSSA,
   Environment,
   flattenReactiveLoops,
+  inferTypes,
   inferMutableRanges,
   inferReactiveScopes,
   inferReactiveScopeVariables,
@@ -47,6 +48,7 @@ type CompilerOutput = {
   ssaOutput: string;
   hirOutput: string;
   eliminateRedundantPhiOutput: string;
+  inferTypesOutput: string;
   inferReferenceEffectsOutput: string;
   inferMutableRangesOutput: string;
   inferReactiveScopeVariablesOutput: string;
@@ -79,6 +81,9 @@ function compile(source: string): CompilerOutput | CompilerError {
     eliminateRedundantPhi(ir);
     const eliminateRedundantPhiOutput = printHIR(ir.body);
 
+    inferTypes(ir);
+    const inferTypesOutput = printHIR(ir.body);
+
     inferReferenceEffects(ir);
     const inferReferenceEffectsOutput = printHIR(ir.body);
 
@@ -124,6 +129,7 @@ function compile(source: string): CompilerOutput | CompilerError {
       hirOutput,
       ssaOutput,
       eliminateRedundantPhiOutput,
+      inferTypesOutput,
       inferReferenceEffectsOutput,
       inferMutableRangesOutput,
       inferReactiveScopeVariablesOutput,
@@ -165,6 +171,11 @@ function Output({ store, setTabsOpen, tabsOpen }: Props) {
             output={compilerOutput.eliminateRedundantPhiOutput}
           ></TextTabContent>
         ),
+        InferTypes: (
+          <TextTabContent
+            output={compilerOutput.inferTypesOutput}
+          ></TextTabContent>
+        ),
         InferReferenceEffects: (
           <TextTabContent
             output={compilerOutput.inferReferenceEffectsOutput}
diff --git a/compiler/forget/packages/playground/components/TabbedWindow.tsx b/compiler/forget/packages/playground/components/TabbedWindow.tsx
index b755992943..d284d2d129 100644
--- a/compiler/forget/packages/playground/components/TabbedWindow.tsx
+++ b/compiler/forget/packages/playground/components/TabbedWindow.tsx
@@ -11,6 +11,7 @@ export type TabTypes =
   | "HIR"
   | "SSA"
   | "EliminateRedundantPhi"
+  | "InferTypes"
   | "InferReferenceEffects"
   | "InferMutableRanges"
   | "InferReactiveScopeVariables"
diff --git a/compiler/forget/src/index.ts b/compiler/forget/src/index.ts
index 4c027d37b6..904ce2ed10 100644
--- a/compiler/forget/src/index.ts
+++ b/compiler/forget/src/index.ts
@@ -19,6 +19,7 @@ import codegen from "./HIR/Codegen";
 import { Environment } from "./HIR/HIRBuilder";
 import { inferMutableRanges } from "./HIR/InferMutableRanges";
 import inferReferenceEffects from "./HIR/InferReferenceEffects";
+import { inferTypes } from "./HIR/InferTypes";
 import printHIR, { printFunction } from "./HIR/PrintHIR";
 import { buildReactiveFunction } from "./ReactiveScopes/BuildReactiveFunction";
 import { codegenReactiveFunction } from "./ReactiveScopes/CodegenReactiveFunction";
@@ -63,6 +64,7 @@ export const HIR = {
   eliminateRedundantPhi,
   enterSSA,
   Environment,
+  inferTypes,
   inferMutableRanges,
   inferReactiveScopes,
   inferReactiveScopeVariables,