diff --git a/src/xschem.tcl b/src/xschem.tcl
index 274391a9..099a2d3a 100644
--- a/src/xschem.tcl
+++ b/src/xschem.tcl
@@ -625,7 +625,7 @@ proc from_eng {i} {
     u         { expr {1e-6}}
     m         { expr {1e-3}}
     k         { expr {1e3}}
-    x         { expr {1e6}} ;# Xyce extension
+    x         { expr {1e6}}
     meg       { expr {1e6}}
     g         { expr {1e9}}
     t         { expr {1e12}}