diff --git a/README.rdoc b/README.rdoc
index d7424b5..83d6d9a 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -109,7 +109,7 @@ Example code:
 
 == Thread Safety
 
-The driver is thread safe.
+The driver is thread-safe.
 
 == Connection Pooling