diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@
   <img alt="Coverity Scan Build Status"
        src="https://scan.coverity.com/projects/5721/badge.svg"/>
 </a>  
+[![Coverage Status](https://coveralls.io/repos/fougue/gmio/badge.svg?branch=master&service=github)](https://coveralls.io/github/fougue/gmio?branch=master)
 
 gmio: C library for geometry input/output
 ===========================================