diff --git a/common/json_param.c b/common/json_param.c
index f2f853585..d832db152 100644
--- a/common/json_param.c
+++ b/common/json_param.c
@@ -53,10 +53,9 @@ static void param_add(struct param **params,
 	tal_arr_expand(params, last);
 }
 
-/* FIXME: To support the deprecated p_req_dup_ok */
 static bool is_required(enum param_style style)
 {
-	return style == PARAM_REQUIRED || style == PARAM_REQUIRED_ALLOW_DUPS;
+	return style == PARAM_REQUIRED;
 }
 
 static struct command_result *make_callback(struct command *cmd,
@@ -176,8 +175,6 @@ static struct command_result *parse_by_name(struct command *cmd,
 			struct command_result *res;
 
 			if (p->is_set) {
-				if (p->style == PARAM_REQUIRED_ALLOW_DUPS)
-					continue;
 				return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
 						    "duplicate json names: %s",
 						    p->name);
diff --git a/common/json_param.h b/common/json_param.h
index 70262010a..1fc6cfc26 100644
--- a/common/json_param.h
+++ b/common/json_param.h
@@ -83,7 +83,6 @@ const char *param_subcommand(struct command *cmd, const char *buffer,
 
 enum param_style {
 	PARAM_REQUIRED,
-	PARAM_REQUIRED_ALLOW_DUPS,
 	PARAM_OPTIONAL,
 	PARAM_OPTIONAL_WITH_DEFAULT,
 	PARAM_OPTIONAL_DEV_WITH_DEFAULT,
@@ -116,20 +115,6 @@ enum param_style {
 				  (const jsmntok_t *)NULL,      \
 				  (arg)) == (struct command_result *)NULL); })
 
-/*
- * Add an required parameter, like p_req, but ignore duplicates.
- */
-#define p_req_dup_ok(name, cbx, arg)                            \
-	      name"",                                           \
-	      PARAM_REQUIRED_ALLOW_DUPS,                        \
-	      (param_cbx)(cbx),                                 \
-	      ({ *arg = NULL;                                   \
-		 (arg) + 0*sizeof((cbx)((struct command *)NULL, \
-		                  (const char *)NULL,           \
-				  (const char *)NULL,           \
-				  (const jsmntok_t *)NULL,      \
-				  (arg)) == (struct command_result *)NULL); })
-
 /*
  * Add an optional parameter.  *arg is set to @def if it isn't found.
  */