diff --git a/Libraries/LibJS/Rust/src/bytecode/codegen.rs b/Libraries/LibJS/Rust/src/bytecode/codegen.rs
index f9e55c0d2b..43137e13cb 100644
--- a/Libraries/LibJS/Rust/src/bytecode/codegen.rs
+++ b/Libraries/LibJS/Rust/src/bytecode/codegen.rs
@@ -2884,10 +2884,12 @@ fn emit_resolve_binding_for_identifier_assignment(
 ) -> Option<ResolvedBinding> {
     let arena = generator.arena.clone();
     let ident = &arena.identifiers[id];
-    if ident.is_local() || ident.is_global {
+    if ident.is_local() || (ident.is_global && !generator.strict) {
         return None;
     }
 
+    // In strict mode, a global-looking identifier may still be unresolvable. Preserve that reference across RHS
+    // evaluation so PutValue throws even if the RHS creates a global property with the same name.
     let identifier = generator.intern_identifier_id(ident.name);
     if generator.environment_coordinate_for_identifier(identifier).is_some() {
         return None;
diff --git a/Tests/LibJS/Bytecode/expected/tagged-template-if-register-order.txt b/Tests/LibJS/Bytecode/expected/tagged-template-if-register-order.txt
index 82678c9b06..4d6353fef3 100644
--- a/Tests/LibJS/Bytecode/expected/tagged-template-if-register-order.txt
+++ b/Tests/LibJS/Bytecode/expected/tagged-template-if-register-order.txt
@@ -1,5 +1,5 @@
-$75ea5b81 tagged-template-if-register-order.js:2:1
-  Registers: 10
+$73266a71 tagged-template-if-register-order.js:2:1
+  Registers: 11
   Blocks:    3
   Constants:
     [0] = String("use strict")
@@ -20,11 +20,12 @@ block0:
   [  c0] JumpFalse condition:reg6, target:block2
 
 block1:
-  [  d0] GetGlobal dst:reg5, `x`
-  [  e0] GetById dst:reg9, base:reg5, `toUpperCase` (x.toUpperCase)
-  [  f8] Call dst:reg7, callee:reg9, this_value:reg5, x.toUpperCase
-  [ 118] SetGlobal `y`, src:reg7
-  [ 128] Mov dst:reg8, src:reg7
+  [  d0] ResolveBinding dst:reg7, `y`
+  [  e0] GetGlobal dst:reg9, `x`
+  [  f0] GetById dst:reg10, base:reg9, `toUpperCase` (x.toUpperCase)
+  [ 108] Call dst:reg5, callee:reg10, this_value:reg9, x.toUpperCase
+  [ 128] SetResolvedBinding environment:reg7, `y`, src:reg5
+  [ 138] Mov dst:reg8, src:reg5
 
 block2:
-  [ 138] End value:reg8
+  [ 148] End value:reg8
diff --git a/Tests/LibJS/Runtime/invalid-lhs-in-assignment.js b/Tests/LibJS/Runtime/invalid-lhs-in-assignment.js
index 56017629dd..f7ee582250 100644
--- a/Tests/LibJS/Runtime/invalid-lhs-in-assignment.js
+++ b/Tests/LibJS/Runtime/invalid-lhs-in-assignment.js
@@ -16,6 +16,16 @@ test("assignment to function call in strict mode is a SyntaxError", () => {
     expect("'use strict'; foo() = 'foo'").not.toEval();
 });
 
+test("strict assignment to unresolvable reference preserves initial reference", () => {
+    delete globalThis.__test_unresolvable_assignment;
+    expect(() => {
+        "use strict";
+        __test_unresolvable_assignment = (globalThis.__test_unresolvable_assignment = 5);
+    }).toThrowWithMessage(ReferenceError, "'__test_unresolvable_assignment' is not defined");
+    expect(globalThis.__test_unresolvable_assignment).toBe(5);
+    delete globalThis.__test_unresolvable_assignment;
+});
+
 test("assignment to inline function call", () => {
     expect(() => {
         (function () {})() = "foo";