diff --git a/llvm/lib/System/Interix/Path.cpp b/llvm/lib/System/Interix/Path.cpp
index ea009e2..47f6c5d 100644
--- a/llvm/lib/System/Interix/Path.cpp
+++ b/llvm/lib/System/Interix/Path.cpp
@@ -45,6 +45,11 @@
   return result;
 }
 
+std::string
+Path::GetDLLSuffix() {
+  return "dll";
+}
+
 }
 
 // vim: sw=2 smartindent smarttab tw=80 autoindent expandtab