diff --git a/clang-format b/clang-format
index 56a30d3761ce7e13701d14bc31eb82dc82b58199..ebcd8ad9c7a85c5f0ac781a0992bc23f17702f4d 100644
--- a/clang-format
+++ b/clang-format
@@ -1,4 +1,5 @@
 ---
+# Format file from: https://github.com/davetcoleman/roscpp_code_format (bfa4ea78b4ac856da07458c8824bf5eb327ea693)
 BasedOnStyle: Google
 AccessModifierOffset: -2
 ConstructorInitializerIndentWidth: 2