diff --git a/strbuf_helpers.c b/strbuf_helpers.c
index e2ed5ec3..50eaee1c 100644
--- a/strbuf_helpers.c
+++ b/strbuf_helpers.c
@@ -465,6 +465,12 @@ strbuf strbuf_json_null(strbuf sb)
   return sb;
 }
 
+strbuf strbuf_json_boolean(strbuf sb, int boolean)
+{
+  strbuf_puts(sb, boolean ? "true" : "false");
+  return sb;
+}
+
 strbuf strbuf_json_string(strbuf sb, const char *str)
 {
   if (str) {
diff --git a/strbuf_helpers.h b/strbuf_helpers.h
index 4fee86cb..2a7a4a1a 100644
--- a/strbuf_helpers.h
+++ b/strbuf_helpers.h
@@ -166,6 +166,7 @@ strbuf strbuf_append_quoted_string(strbuf sb, const char *str);
  * @author Andrew Bettison <andrew@servalproject.com>
  */
 strbuf strbuf_json_null(strbuf sb);
+strbuf strbuf_json_boolean(strbuf sb, int boolean);
 strbuf strbuf_json_string(strbuf sb, const char *str);
 strbuf strbuf_json_hex(strbuf sb, const unsigned char *buf, size_t len);