diff --git a/tcl/Sta.tcl b/tcl/Sta.tcl
index f40ab78f..3d3f23e5 100644
--- a/tcl/Sta.tcl
+++ b/tcl/Sta.tcl
@@ -597,7 +597,7 @@ define_cmd_args "unset_timing_derate" {}
 
 proc unset_timing_derate { args } {
   check_argc_eq0 "unset_timing_derate" $args
-  reset_timing_derate_cmd
+  unset_timing_derate_cmd
 }
 
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