diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index d5aa79e..b407631 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -877,7 +877,8 @@
 	srand()			initialize seed used by rand()
 
 Variables:						*var-functions*
-	instanceof()		check if a variable is an instance of a given class
+	instanceof()		check if a variable is an instance of a given
+				class
 	type()			type of a variable as a number
 	typename()		type of a variable as text
 	islocked()		check if a variable is locked