diff --git a/.travis.yml b/.travis.yml
index a1130933349c..7d93a024aa53 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,4 +31,4 @@ notifications:
         - monica@elastic.co
 
 after_success:
-  - bash <(curl -s https://codecov.io/bash) -f coverage/full.cov
\ No newline at end of file
+  - bash <(curl -s https://codecov.io/bash) -f coverage/full.cov
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1fd7b2d437ae..4f73ff726fee 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -21,6 +21,8 @@ The process for contributing to any of the Elastic repositories is similar.
 
 ## Contribution Steps
 
+*Prereq:* libpcap-dev (deb) || libpcap-devel (rpm) should be present in your system.
+
 1. Test your changes! Run the test suite (`make test`)
 2. Please make sure you have signed our [Contributor License
    Agreement](https://www.elastic.co/contributor-agreement/). We are not