diff --git a/packages/compiler-cli/src/ngtsc/partial_evaluator/src/dynamic.ts b/packages/compiler-cli/src/ngtsc/partial_evaluator/src/dynamic.ts
index a0553d2b78..85880d8e74 100644
--- a/packages/compiler-cli/src/ngtsc/partial_evaluator/src/dynamic.ts
+++ b/packages/compiler-cli/src/ngtsc/partial_evaluator/src/dynamic.ts
@@ -32,7 +32,8 @@ export const enum DynamicValueReason {
 
   /**
    * An external reference could not be resolved to a value which can be evaluated.
-   * (E.g. a call expression for a function declared in `.d.ts`.)
+   * For example a call expression for a function declared in `.d.ts`, or accessing native globals
+   * such as `window`.
    */
   EXTERNAL_REFERENCE,
 
diff --git a/packages/compiler-cli/src/ngtsc/partial_evaluator/src/interpreter.ts b/packages/compiler-cli/src/ngtsc/partial_evaluator/src/interpreter.ts
index 80005e48a0..56b9ac70c0 100644
--- a/packages/compiler-cli/src/ngtsc/partial_evaluator/src/interpreter.ts
+++ b/packages/compiler-cli/src/ngtsc/partial_evaluator/src/interpreter.ts
@@ -11,6 +11,7 @@ import * as ts from 'typescript';
 import {Reference} from '../../imports';
 import {OwningModule} from '../../imports/src/references';
 import {Declaration, ReflectionHost} from '../../reflection';
+import {isDeclaration} from '../../util/src/typescript';
 
 import {ArrayConcatBuiltinFn, ArraySliceBuiltinFn} from './builtin';
 import {DynamicValue} from './dynamic';
@@ -361,12 +362,15 @@ export class StaticInterpreter {
           }
         }
         return value;
+      } else if (isDeclaration(ref)) {
+        return DynamicValue.fromDynamicInput(
+            node, DynamicValue.fromExternalReference(ref, lhs as Reference<ts.Declaration>));
       }
     } else if (lhs instanceof DynamicValue) {
       return DynamicValue.fromDynamicInput(node, lhs);
-    } else {
-      throw new Error(`Invalid dot property access: ${lhs} dot ${rhs}`);
     }
+
+    return DynamicValue.fromUnknown(node);
   }
 
   private visitCallExpression(node: ts.CallExpression, context: Context): ResolvedValue {
diff --git a/packages/compiler-cli/src/ngtsc/partial_evaluator/test/evaluator_spec.ts b/packages/compiler-cli/src/ngtsc/partial_evaluator/test/evaluator_spec.ts
index a4a1d5523a..4cf93ea800 100644
--- a/packages/compiler-cli/src/ngtsc/partial_evaluator/test/evaluator_spec.ts
+++ b/packages/compiler-cli/src/ngtsc/partial_evaluator/test/evaluator_spec.ts
@@ -122,6 +122,20 @@ describe('ngtsc metadata', () => {
     expect(evaluate(`const x = 3;`, '!!x')).toEqual(true);
   });
 
+  it('resolves access from external variable declarations as dynamic value', () => {
+    const value = evaluate('declare const window: any;', 'window.location');
+    if (!(value instanceof DynamicValue)) {
+      return fail(`Should have resolved to a DynamicValue`);
+    }
+    expect(value.isFromDynamicInput()).toEqual(true);
+    expect(value.node.getText()).toEqual('window.location');
+    if (!(value.reason instanceof DynamicValue)) {
+      return fail(`Should have a DynamicValue as reason`);
+    }
+    expect(value.reason.isFromExternalReference()).toEqual(true);
+    expect(value.reason.node.getText()).toEqual('window: any');
+  });
+
   it('imports work', () => {
     const {program} = makeProgram([
       {name: 'second.ts', contents: 'export function foo(bar) { return bar; }'},