diff --git a/gis/therion/README b/gis/therion/README
index 505a80ddc0..f4b4f85aad 100644
--- a/gis/therion/README
+++ b/gis/therion/README
@@ -50,7 +50,7 @@ library is installed in your system you would use it. In this case
 you can set the build for use of the external library passing an 
 environment variable to the script as following:
 
-	FMT=yes ./therion.SlackBuild
+  FMT=yes ./therion.SlackBuild
 
 WARNINGS
 Note that the platform works only with some standards, interpreters or