diff --git a/lightningd/log.c b/lightningd/log.c
index a759296a7..8334e6391 100644
--- a/lightningd/log.c
+++ b/lightningd/log.c
@@ -653,6 +653,22 @@ void json_add_log(struct json_result *response, const char *fieldname,
 	json_array_end(info.response);
 }
 
+bool json_tok_loglevel(const char *buffer, const jsmntok_t *tok,
+		       enum log_level *level)
+{
+	if (json_tok_streq(buffer, tok, "io"))
+		*level = LOG_IO_OUT;
+	else if (json_tok_streq(buffer, tok, "debug"))
+		*level = LOG_DBG;
+	else if (json_tok_streq(buffer, tok, "info"))
+		*level = LOG_INFORM;
+	else if (json_tok_streq(buffer, tok, "unusual"))
+		*level = LOG_UNUSUAL;
+	else
+		return false;
+	return true;
+}
+
 static void json_getlog(struct command *cmd,
 			const char *buffer, const jsmntok_t *params)
 {
@@ -667,15 +683,7 @@ static void json_getlog(struct command *cmd,
 
 	if (!level)
 		minlevel = LOG_INFORM;
-	else if (json_tok_streq(buffer, level, "io"))
-		minlevel = LOG_IO_OUT;
-	else if (json_tok_streq(buffer, level, "debug"))
-		minlevel = LOG_DBG;
-	else if (json_tok_streq(buffer, level, "info"))
-		minlevel = LOG_INFORM;
-	else if (json_tok_streq(buffer, level, "unusual"))
-		minlevel = LOG_UNUSUAL;
-	else {
+	else if (!json_tok_loglevel(buffer, level, &minlevel)) {
 		command_fail(cmd, "Invalid level param");
 		return;
 	}
diff --git a/lightningd/log.h b/lightningd/log.h
index 22ab534ba..3082fc5eb 100644
--- a/lightningd/log.h
+++ b/lightningd/log.h
@@ -6,6 +6,7 @@
 #include <ccan/typesafe_cb/typesafe_cb.h>
 #include <common/status.h>
 #include <common/type_to_string.h>
+#include <jsmn.h>
 #include <stdarg.h>
 
 struct json_result;
@@ -101,4 +102,7 @@ void NORETURN PRINTF_FMT(1,2) fatal(const char *fmt, ...);
 void json_add_log(struct json_result *result, const char *fieldname,
 		  const struct log_book *lr, enum log_level minlevel);
 
+bool json_tok_loglevel(const char *buffer, const jsmntok_t *tok,
+		       enum log_level *level);
+
 #endif /* LIGHTNING_LIGHTNINGD_LOG_H */
diff --git a/lightningd/peer_control.c b/lightningd/peer_control.c
index 068e245f5..bc00103e2 100644
--- a/lightningd/peer_control.c
+++ b/lightningd/peer_control.c
@@ -944,15 +944,7 @@ static void json_listpeers(struct command *cmd,
 	}
 	if (leveltok) {
 		gpa->ll = tal(gpa, enum log_level);
-		if (json_tok_streq(buffer, leveltok, "debug"))
-			*gpa->ll = LOG_DBG;
-		else if (json_tok_streq(buffer, leveltok, "info"))
-			*gpa->ll = LOG_INFORM;
-		else if (json_tok_streq(buffer, leveltok, "unusual"))
-			*gpa->ll = LOG_UNUSUAL;
-		else if (json_tok_streq(buffer, leveltok, "broken"))
-			*gpa->ll = LOG_BROKEN;
-		else {
+		if (!json_tok_loglevel(buffer, leveltok, gpa->ll)) {
 			command_fail(cmd, "Invalid level param");
 			return;
 		}