diff --git a/README.md b/README.md
index 2632fbe2e..02ed5149c 100644
--- a/README.md
+++ b/README.md
@@ -62,10 +62,11 @@ If you are using the factor in academic work, please cite the publications above
 In GTSAM 4 a new and more efficient implementation, based on integrating on the NavState tangent space and detailed in docs/ImuFactor.pdf, is enabled by default. To switch to the RSS 2015 version, set the flag **GTSAM_TANGENT_PREINTEGRATION** to OFF.
 
 
-
 Additional Information
 ----------------------
 
+There is a [`GTSAM users Google group`](https://groups.google.com/forum/#!forum/gtsam-users) for general discussion.
+
 Read about important [`GTSAM-Concepts`](GTSAM-Concepts.md) here. A primer on GTSAM Expressions, 
 which support (superfast) automatic differentiation, 
 can be found on the [GTSAM wiki on BitBucket](https://bitbucket.org/gtborg/gtsam/wiki/Home).