diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index d0d7062ff..dfb0abeae 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -1001,7 +1001,7 @@ let {{
 
     class Rdbase(SegOp):
         code = '''
-            DestReg = SegBaseDest;
+            DestReg = SegBaseSrc1;
         '''
 
     class Rdlimit(SegOp):