diff --git a/README.md b/README.md
index 01a3d02..7f2e3e2 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ Swift RPM for Fedora.
 sudo dnf install libbsd python gcc-c++ clang
 sudo rpm -Uvh swift-2.2-SNAPSHOT20151210a.x86_64.rpm
 ```
+Tested on Fedora 22 and 23, 64 bits.
+
 ## Run a RPM build
 
 To build a new tag version of swift edit rpm-from-source.sh and change TAG, REL and VER accordingly.