diff --git a/.gitattributes b/.gitattributes
index 58c8570082..03f42e5e1f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3,6 +3,7 @@
 ## C++ and C source files
 *.c                     text eol=lf diff=cpp
 *.h                     text eol=lf diff=cpp
+*.cc                    text eol=lf diff=cpp
 *.cpp                   text eol=lf diff=cpp
 *.cxx                   text eol=lf diff=cpp
 *.hpp                   text eol=lf diff=cpp
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 40a8ba8e7a..65196c8c57 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -64,7 +64,7 @@ requests (PRs).
 To create a new PR, fork the project in GitHub and clone the upstream repo:
 
 ```sh
-git clone https://github.com/open-telemetry/opentelemetry-cpp.git
+git clone --recursive https://github.com/open-telemetry/opentelemetry-cpp.git
 ```
 
 Add your fork as a remote: