diff --git a/llvm/test/tools/llvm-ar/print-thin-archive-path.test b/llvm/test/tools/llvm-ar/print-thin-archive-path.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-ar/print-thin-archive-path.test
@@ -0,0 +1,10 @@
+RUN: mkdir -p %t/foo
+RUN: touch %t/foo/a.txt
+RUN: rm -f %t/foo/archive.a
+
+RUN: cd %t && llvm-ar rcST foo/archive.a foo/a.txt
+RUN: cd %t && llvm-ar t foo/archive.a | FileCheck %s --match-full-lines --check-prefix=PARENT-DIR
+RUN: cd %t/foo && llvm-ar t archive.a | FileCheck %s --match-full-lines --check-prefix=CHILD-DIR
+
+PARENT-DIR: foo/a.txt
+CHILD-DIR:  a.txt
\ No newline at end of file
diff --git a/llvm/tools/llvm-ar/llvm-ar.cpp b/llvm/tools/llvm-ar/llvm-ar.cpp
--- a/llvm/tools/llvm-ar/llvm-ar.cpp
+++ b/llvm/tools/llvm-ar/llvm-ar.cpp
@@ -429,8 +429,9 @@
   }
 
   if (C.getParent()->isThin()) {
-    outs() << sys::path::parent_path(ArchiveName);
-    outs() << '/';
+    StringRef ParentDir = sys::path::parent_path(ArchiveName);
+    if (!ParentDir.empty())
+      outs() << ParentDir << '/';
   }
   outs() << Name << "\n";
 }