diff --git a/clang/lib/Driver/ToolChains/AVR.cpp b/clang/lib/Driver/ToolChains/AVR.cpp
--- a/clang/lib/Driver/ToolChains/AVR.cpp
+++ b/clang/lib/Driver/ToolChains/AVR.cpp
@@ -79,8 +79,6 @@
 
         getFilePaths().push_back(LibcRoot + std::string("/lib/") +
                                  std::string(*FamilyName));
-        getFilePaths().push_back(LibcRoot + std::string("/lib/") +
-                                 std::string(*FamilyName));
         getFilePaths().push_back(GCCRoot + std::string("/") +
                                  std::string(*FamilyName));