diff --git a/site_ansto/instrument/sans/config/parameters/parameters.tcl b/site_ansto/instrument/sans/config/parameters/parameters.tcl
index 689d10f4..d4292090 100644
--- a/site_ansto/instrument/sans/config/parameters/parameters.tcl
+++ b/site_ansto/instrument/sans/config/parameters/parameters.tcl
@@ -98,7 +98,7 @@ sicslist setatt L1mm units mm
 ::utility::macro::getset float L2mm {} {
   set detpy [SplitReply [DetPosYmm]]
   set detpyos [SplitReply [DetPosYOffsetmm]]
-  set sapy [SplitReply [SApPosYmm]]
+  set sapy [SplitReply [SamplePosYmm]]
   return [sicsmsgfmt [expr {$detpyos + $detpyos - $sapy}]]
 }
 sicslist setatt L2mm klass detector