diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ from setuptools import setup
 
 
 if TkVersion <= 8.5:
-    message = "This version of ttkthemes does not support Tk 8.5 and earlier. Please install an earlier version."
+    message = "This version of ttkthemes does not support Tk 8.5 and earlier. Please install a later version."
     raise RuntimeError(message)
Fix RuntimeError message upon installation with Tk <I> or earlier (#<I>)