diff --git a/lld/test/wasm/lto/Inputs/foo.ll b/lld/test/wasm/lto/Inputs/foo.ll
index f3b54cc7d0094..695b552fc6249 100644
--- a/lld/test/wasm/lto/Inputs/foo.ll
+++ b/lld/test/wasm/lto/Inputs/foo.ll
@@ -1,7 +1,17 @@
 target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-unknown"
 
-define void @foo() local_unnamed_addr {
+define void @foo() {
+entry:
+  ret void
+}
+
+define void @baz() {
+entry:
+  ret void
+}
+
+define void @quux() {
 entry:
   ret void
 }
diff --git a/lld/test/wasm/lto/Inputs/stub.so b/lld/test/wasm/lto/Inputs/stub.so
index e76c890dbb435..c471b81da5064 100644
--- a/lld/test/wasm/lto/Inputs/stub.so
+++ b/lld/test/wasm/lto/Inputs/stub.so
@@ -1,3 +1,4 @@
 #STUB
 bar: foo
 memcpy: foo
+baz: quux
diff --git a/lld/test/wasm/lto/stub-library.s b/lld/test/wasm/lto/stub-library.s
index 36d6b7b3f38aa..3ad3ebb597c63 100644
--- a/lld/test/wasm/lto/stub-library.s
+++ b/lld/test/wasm/lto/stub-library.s
@@ -1,6 +1,10 @@
 ## The function `bar` is declared in stub.so and depends on `foo` which is
 ## defined in an LTO object.  We also test the case where the LTO object is
 ## with an archive file.
+## The function `baz` is declared in stub.so and depends on `quux`, and both
+## `baz` and `quux` are defined in an LTO object. When `baz` is DCE'd and
+## becomes undefined in the LTO process, `quux` should still be preserved and
+## exported.
 ## This verifies that stub library dependencies (which are required exports) can
 ## be defined in LTO objects, even when they are within archive files.
 
@@ -40,3 +44,6 @@ _start:
 # CHECK-NEXT:       - Name:            foo
 # CHECK-NEXT:         Kind:            FUNCTION
 # CHECK-NEXT:         Index:           2
+# CHECK-NEXT:       - Name:            quux
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Index:           3
diff --git a/lld/wasm/Driver.cpp b/lld/wasm/Driver.cpp
index 97e50783985a8..6d5447be812aa 100644
--- a/lld/wasm/Driver.cpp
+++ b/lld/wasm/Driver.cpp
@@ -1028,7 +1028,11 @@ static void processStubLibrariesPreLTO() {
       // If the symbol is not present at all (yet), or if it is present but
       // undefined, then mark the dependent symbols as used by a regular
       // object so they will be preserved and exported by the LTO process.
-      if (!sym || sym->isUndefined()) {
+      // If the symbol is defined and in bitcode, it can be DCE'd during LTO and
+      // become undefined, so mark the dependent symbols as used by a regular
+      // object as well.
+      if (!sym || sym->isUndefined() ||
+          (sym->isDefined() && isa<BitcodeFile>(sym->getFile()))) {
         for (const auto dep : deps) {
           auto* needed = symtab->find(dep);
           if (needed ) {