diff --git a/lld/ELF/ScriptParser.cpp b/lld/ELF/ScriptParser.cpp
--- a/lld/ELF/ScriptParser.cpp
+++ b/lld/ELF/ScriptParser.cpp
@@ -329,7 +329,7 @@
 void ScriptParser::readExtern() {
   expect("(");
   while (!errorCount() && !consume(")"))
-    Config->Undefined.push_back(next());
+    Config->Undefined.push_back(unquote(next()));
 }
 
 void ScriptParser::readGroup() {
diff --git a/lld/test/ELF/linkerscript/linkerscript.s b/lld/test/ELF/linkerscript/linkerscript.s
--- a/lld/test/ELF/linkerscript/linkerscript.s
+++ b/lld/test/ELF/linkerscript/linkerscript.s
@@ -3,7 +3,7 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux \
 # RUN:   %p/Inputs/libsearch-st.s -o %t2.o
 
-# RUN: echo "EXTERN( undef undef2 )" > %t.script
+# RUN: echo "EXTERN( undef undef2 \"undef3\" \"undef4@@other\")" > %t.script
 # RUN: ld.lld %t -o %t2 %t.script
 # RUN: llvm-readobj %t2 > /dev/null