diff --git a/lld/test/MachO/lto-cache-dsymutil.ll b/lld/test/MachO/lto-cache-dsymutil.ll
new file mode 100644
--- /dev/null
+++ b/lld/test/MachO/lto-cache-dsymutil.ll
@@ -0,0 +1,28 @@
+; REQUIRES: x86
+
+; RUN: rm -rf %t; mkdir %t
+; RUN: opt -module-hash -module-summary %s -o %t/foo.o
+; RUN: %lld -cache_path_lto %t/cache -o %t/test %t/foo.o
+
+;; Check that dsymutil is able to read the .o file out of the thinlto cache.
+; RUN: dsymutil -f -o - %t/test | llvm-dwarfdump - | FileCheck %s
+; CHECK: DW_AT_name ("test.cpp")
+
+
+target triple = "x86_64-apple-macosx10.15.0"
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+
+define void @main() #0 !dbg !4 {
+  ret void
+}
+
+!llvm.module.flags = !{ !0, !1 }
+!llvm.dbg.cu = !{!2}
+
+!0 = !{i32 7, !"Dwarf Version", i32 4}
+!1 = !{i32 2, !"Debug Info Version", i32 3}
+!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, emissionKind: FullDebug)
+!3 = !DIFile(filename: "test.cpp", directory: "/tmp")
+!4 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 1, type: !5, scopeLine: 1, unit: !2)
+!5 = !DISubroutineType(types: !6)
+!6 = !{}
diff --git a/llvm/lib/Support/Caching.cpp b/llvm/lib/Support/Caching.cpp
--- a/llvm/lib/Support/Caching.cpp
+++ b/llvm/lib/Support/Caching.cpp
@@ -99,7 +99,7 @@
         // Open the file first to avoid racing with a cache pruner.
         ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
             MemoryBuffer::getOpenFile(
-                sys::fs::convertFDToNativeFile(TempFile.FD), TempFile.TmpName,
+                sys::fs::convertFDToNativeFile(TempFile.FD), EntryPath,
                 /*FileSize=*/-1, /*RequiresNullTerminator=*/false);
         if (!MBOrErr)
           report_fatal_error(Twine("Failed to open new cache file ") +