diff --git a/doc/rpm-build/post_install.php b/doc/rpm-build/post_install.php
index 23a1b7e602..092dd6fad1 100755
--- a/doc/rpm-build/post_install.php
+++ b/doc/rpm-build/post_install.php
@@ -487,7 +487,7 @@ function randomstring($len=16)
 		'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
 		'w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L',
 		'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
-		'@','!','$','%','&','(',')','=','?',';',':','#','_','-','<',
+		'@','!','%','&','(',')','=','?',';',':','#','_','-','<',
 		'>','|','[',']','}',	// dont add /\,'"{ as we have problems dealing with them
 	);