diff --git a/lib/Interpreter/Paths.cpp b/lib/Interpreter/Paths.cpp
index d41e428a5..bbd70d89c 100644
--- a/lib/Interpreter/Paths.cpp
+++ b/lib/Interpreter/Paths.cpp
@@ -131,7 +131,7 @@ namespace platform {
     return lib.getOSSpecificHandle();
   }
 
-  void DLClose(void* Lib, std::string* Err /* = nullptr*/) {
+  void DLClose(void* Lib, std::string& Err /* = nullptr*/) {
     auto dl = llvm::sys::DynamicLibrary(Lib);
     llvm::sys::DynamicLibrary::closeLibrary(dl);
     if (Err) {
diff --git a/lib/Interpreter/Paths.h b/lib/Interpreter/Paths.h
index 6cb3db258..6b8862aea 100644
--- a/lib/Interpreter/Paths.h
+++ b/lib/Interpreter/Paths.h
@@ -49,8 +49,6 @@ std::string NormalizePath(const std::string& Path);
 ///
 void* DLOpen(const std::string& Path, std::string& Err);
 
-void* DLSym(const std::string& Name, std::string& Err);
-
 ///\brief Close a handle to a shared library.
 ///
 /// \param [in] Lib - Handle to library from previous call to DLOpen