diff --git a/site_ansto/instrument/util/config_reader.tcl b/site_ansto/instrument/util/config_reader.tcl
index 482f6203..40124cd0 100644
--- a/site_ansto/instrument/util/config_reader.tcl
+++ b/site_ansto/instrument/util/config_reader.tcl
@@ -70,11 +70,11 @@ proc config_reader::parse_file {filename} {
         set value [string trim [lindex $pair 1] " "]
         # Remove matching quotes on both ends (single, double and braces)
         if { [string index $value 0] == "'" && [string index $value end] == "'" } {
-          set value [string range 1 end-1]
+          set value [string range $value 1 end-1]
         } elseif { [string index $value 0] == "\"" && [string index $value end] == "\"" } {
-          set value [string range 1 end-1]
+          set value [string range $value 1 end-1]
         } elseif { [string index $value 0] == "{" && [string index $value end] == "}" } {
-          set value [string range 1 end-1]
+          set value [string range $value 1 end-1]
         }
         config_reader::set_var dictionary $cursection $name $value
       }