diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 74eb7555ff..451f27b8a0 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2021-03-08  Tom Tromey  <tom@tromey.com>
+
+	* std-operator.def (OP_EXTENDED0): Remove.
+
 2021-03-08  Tom Tromey  <tom@tromey.com>
 
 	* std-operator.def (OP_NAME, OP_ATR_IMAGE, OP_ATR_MODULUS)
diff --git a/gdb/std-operator.def b/gdb/std-operator.def
index f5804b301e..82daabeaa9 100644
--- a/gdb/std-operator.def
+++ b/gdb/std-operator.def
@@ -326,10 +326,6 @@ OP (OP_TYPEID)
    takes two expression arguments.  */
 OP (OP_RUST_ARRAY)
 
-/* First extension operator.  Some language modules define extra
-   operators below with numbers higher than OP_EXTENDED0.  */
-OP (OP_EXTENDED0)
-
 /* ================ Ada operators ================ */
 
 /* X IN A'RANGE(N).  N is an immediate operand, surrounded by