diff --git a/apps/api-extractor/src/analyzer/TypeScriptInternals.ts b/apps/api-extractor/src/analyzer/TypeScriptInternals.ts
index 32ab70795bd..e8b74f8844a 100644
--- a/apps/api-extractor/src/analyzer/TypeScriptInternals.ts
+++ b/apps/api-extractor/src/analyzer/TypeScriptInternals.ts
@@ -48,7 +48,7 @@ export class TypeScriptInternals {
     if (
       // eslint-disable-next-line no-bitwise
       symbol.flags & ts.SymbolFlags.Transient &&
-      (symbol as any).checkFlags === (ts as any).CheckFlags.Late
+      (ts as any).getCheckFlags(symbol) === (ts as any).CheckFlags.Late
     ) {
       return true;
     }
diff --git a/common/changes/@microsoft/api-extractor/check-flags_2023-01-16-22-41.json b/common/changes/@microsoft/api-extractor/check-flags_2023-01-16-22-41.json
new file mode 100644
index 00000000000..917484fe346
--- /dev/null
+++ b/common/changes/@microsoft/api-extractor/check-flags_2023-01-16-22-41.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/api-extractor",
+      "comment": "Use ts.getCheckFlags to fix TS 5.0",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@microsoft/api-extractor"
+}
\ No newline at end of file