diff --git a/documentation/specification.md b/documentation/specification.md
index 0d3104c..254d909 100644
--- a/documentation/specification.md
+++ b/documentation/specification.md
@@ -187,4 +187,4 @@ T   : ISO 8601 time format ("HH:MM:SS")
 ```
 
 # Environment
-HISTUIHIST  : histuidb to be used
+HISTUIFILE  : histuidb to be used