diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 27ec079f614ab..8b04eb6226461 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -3432,6 +3432,9 @@ function createBinder(): (file: SourceFile, options: CompilerOptions) => void {
             bindExportsPropertyAssignment(node as BindableStaticPropertyAssignmentExpression);
         }
         else if (hasDynamicName(node)) {
+            if (!parentSymbol) {
+                return;
+            }
             bindAnonymousDeclaration(node, SymbolFlags.Property | SymbolFlags.Assignment, InternalSymbolName.Computed);
             const sym = bindPotentiallyMissingNamespaces(parentSymbol, node.left.expression, isTopLevelNamespaceAssignment(node.left), /*isPrototypeProperty*/ false, /*containerIsClass*/ false);
             addLateBoundAssignmentDeclarationToSymbol(node, sym);
diff --git a/tests/baselines/reference/lateboundWindowToplevelAssignment.symbols b/tests/baselines/reference/lateboundWindowToplevelAssignment.symbols
new file mode 100644
index 0000000000000..f1779520e44c5
--- /dev/null
+++ b/tests/baselines/reference/lateboundWindowToplevelAssignment.symbols
@@ -0,0 +1,14 @@
+//// [tests/cases/conformance/salsa/lateboundWindowToplevelAssignment.ts] ////
+
+=== lateboundWindowToplevelAssignment.js ===
+const UPDATE_MARKER_FUNC = 'updateMarkerPosition';
+>UPDATE_MARKER_FUNC : Symbol(UPDATE_MARKER_FUNC, Decl(lateboundWindowToplevelAssignment.js, 0, 5))
+
+window[UPDATE_MARKER_FUNC] = () => {};
+>window : Symbol(window, Decl(lib.dom.d.ts, --, --))
+>UPDATE_MARKER_FUNC : Symbol(UPDATE_MARKER_FUNC, Decl(lateboundWindowToplevelAssignment.js, 0, 5))
+
+window[UPDATE_MARKER_FUNC]();
+>window : Symbol(window, Decl(lib.dom.d.ts, --, --))
+>UPDATE_MARKER_FUNC : Symbol(UPDATE_MARKER_FUNC, Decl(lateboundWindowToplevelAssignment.js, 0, 5))
+
diff --git a/tests/baselines/reference/lateboundWindowToplevelAssignment.types b/tests/baselines/reference/lateboundWindowToplevelAssignment.types
new file mode 100644
index 0000000000000..1f9ab09aaebe8
--- /dev/null
+++ b/tests/baselines/reference/lateboundWindowToplevelAssignment.types
@@ -0,0 +1,28 @@
+//// [tests/cases/conformance/salsa/lateboundWindowToplevelAssignment.ts] ////
+
+=== lateboundWindowToplevelAssignment.js ===
+const UPDATE_MARKER_FUNC = 'updateMarkerPosition';
+>UPDATE_MARKER_FUNC : "updateMarkerPosition"
+>                   : ^^^^^^^^^^^^^^^^^^^^^^
+>'updateMarkerPosition' : "updateMarkerPosition"
+>                       : ^^^^^^^^^^^^^^^^^^^^^^
+
+window[UPDATE_MARKER_FUNC] = () => {};
+>window[UPDATE_MARKER_FUNC] = () => {} : () => void
+>                                      : ^^^^^^^^^^
+>window[UPDATE_MARKER_FUNC] : error
+>window : Window & typeof globalThis
+>       : ^^^^^^^^^^^^^^^^^^^^^^^^^^
+>UPDATE_MARKER_FUNC : "updateMarkerPosition"
+>                   : ^^^^^^^^^^^^^^^^^^^^^^
+>() => {} : () => void
+>         : ^^^^^^^^^^
+
+window[UPDATE_MARKER_FUNC]();
+>window[UPDATE_MARKER_FUNC]() : error
+>window[UPDATE_MARKER_FUNC] : error
+>window : Window & typeof globalThis
+>       : ^^^^^^^^^^^^^^^^^^^^^^^^^^
+>UPDATE_MARKER_FUNC : "updateMarkerPosition"
+>                   : ^^^^^^^^^^^^^^^^^^^^^^
+
diff --git a/tests/cases/conformance/salsa/lateboundWindowToplevelAssignment.ts b/tests/cases/conformance/salsa/lateboundWindowToplevelAssignment.ts
new file mode 100644
index 0000000000000..afbdb3bef273e
--- /dev/null
+++ b/tests/cases/conformance/salsa/lateboundWindowToplevelAssignment.ts
@@ -0,0 +1,7 @@
+// @filename: lateboundWindowToplevelAssignment.js
+// @allowJs: true
+// @checkJs: true
+// @noEmit: true
+const UPDATE_MARKER_FUNC = 'updateMarkerPosition';
+window[UPDATE_MARKER_FUNC] = () => {};
+window[UPDATE_MARKER_FUNC]();