diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/Dce.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/Dce.kt
index 845c9fc2831..eb553af07d9 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/Dce.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/Dce.kt
@@ -17,15 +17,17 @@ import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
 import org.jetbrains.kotlin.js.config.JSConfigurationKeys
 import org.jetbrains.kotlin.js.config.RuntimeDiagnostic
+import org.jetbrains.kotlin.serialization.js.ModuleKind
 import org.jetbrains.kotlin.utils.addIfNotNull
 
 fun eliminateDeadDeclarations(
     modules: Iterable<IrModuleFragment>,
     context: JsIrBackendContext,
+    moduleKind: ModuleKind,
     removeUnusedAssociatedObjects: Boolean = true,
     dceDumpNameCache: DceDumpNameCache,
 ) {
-    val allRoots = buildRoots(modules, context)
+    val allRoots = buildRoots(modules, context, moduleKind)
 
     val printReachabilityInfo =
         context.configuration.getBoolean(JSConfigurationKeys.PRINT_REACHABILITY_INFO) ||
@@ -91,7 +93,11 @@ private fun IrDeclaration.addRootsTo(
     }
 }
 
-private fun buildRoots(modules: Iterable<IrModuleFragment>, context: JsIrBackendContext): List<IrDeclaration> = buildList {
+private fun buildRoots(
+    modules: Iterable<IrModuleFragment>,
+    context: JsIrBackendContext,
+    moduleKind: ModuleKind
+): List<IrDeclaration> = buildList {
     val declarationsCollector = object : IrElementVisitorVoid {
         override fun visitElement(element: IrElement): Unit = element.acceptChildrenVoid(this)
         override fun visitBody(body: IrBody): Unit = Unit // Skip
@@ -119,6 +125,11 @@ private fun buildRoots(modules: Iterable<IrModuleFragment>, context: JsIrBackend
         ?.let { add(it) }
 
     addIfNotNull(context.intrinsics.void.owner.backingField)
+
+    if (moduleKind == ModuleKind.UMD) {
+        add(context.intrinsics.globalThis.owner)
+    }
+
     addAll(context.testFunsPerFile.values)
     addAll(context.additionalExportedDeclarations)
 }
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/optimizations.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/optimizations.kt
index 7d57c228ac5..25f318baf47 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/optimizations.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/optimizations.kt
@@ -19,14 +19,16 @@ import org.jetbrains.kotlin.js.backend.ast.JsFunction
 import org.jetbrains.kotlin.js.backend.ast.RecursiveJsVisitor
 import org.jetbrains.kotlin.js.inline.clean.ClassPostProcessor
 import org.jetbrains.kotlin.js.inline.clean.FunctionPostProcessor
+import org.jetbrains.kotlin.serialization.js.ModuleKind
 
 fun optimizeProgramByIr(
     modules: Iterable<IrModuleFragment>,
     context: JsIrBackendContext,
+    moduleKind: ModuleKind,
     removeUnusedAssociatedObjects: Boolean
 ) {
     val dceDumpNameCache = DceDumpNameCache() // in JS mode only DCE Graph could be dumped
-    eliminateDeadDeclarations(modules, context, removeUnusedAssociatedObjects, dceDumpNameCache)
+    eliminateDeadDeclarations(modules, context, moduleKind, removeUnusedAssociatedObjects, dceDumpNameCache)
 
     val phaseConfig = PhaseConfig(jsOptimizationPhases)
     val phaserState = PhaserState<IrModuleFragment>()
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformer.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformer.kt
index 8b9f5aa1a06..2d472ec8b80 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformer.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformer.kt
@@ -210,7 +210,7 @@ class IrModuleToJsTransformer(
         }
 
         if (modes.any { it.production }) {
-            optimizeProgramByIr(modules, backendContext, removeUnusedAssociatedObjects)
+            optimizeProgramByIr(modules, backendContext, moduleKind, removeUnusedAssociatedObjects)
         }
 
         modes.filter { it.production }.forEach {
@@ -225,7 +225,7 @@ class IrModuleToJsTransformer(
         doStaticMembersLowering(modules)
 
         if (mode.production) {
-            optimizeProgramByIr(modules, backendContext, removeUnusedAssociatedObjects)
+            optimizeProgramByIr(modules, backendContext, moduleKind, removeUnusedAssociatedObjects)
         }
 
         return makeJsCodeGeneratorFromIr(exportData, mode)
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/ModuleWrapperTranslation.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/ModuleWrapperTranslation.kt
index cd74e8af485..6e5ba4071e9 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/ModuleWrapperTranslation.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/ModuleWrapperTranslation.kt
@@ -96,7 +96,7 @@ object ModuleWrapperTranslation {
         val selector = JsAstUtils.newJsIf(amdTest, amdBody, JsAstUtils.newJsIf(commonJsTest, commonJsBody, plainBlock))
         adapterBody.statements += selector
 
-        return listOf(JsInvocation(adapter, JsThisRef(), function).makeStmt())
+        return listOf(JsInvocation(adapter, JsName("globalThis", false).makeRef(), function).makeStmt())
     }
 
     private fun wrapAmd(