diff --git a/mongoose.c b/mongoose.c
index cd60e9af..f39efa7d 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -5702,6 +5702,24 @@ struct ws_msg {
   size_t data_len;
 };
 
+size_t mg_ws_vprintf(struct mg_connection *c, int op, const char *fmt,
+                     va_list ap) {
+  char mem[256], *buf = mem;
+  size_t len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
+  len = mg_ws_send(c, buf, len, op);
+  if (buf != mem) free(buf);
+  return len;
+}
+
+size_t mg_ws_printf(struct mg_connection *c, int op, const char *fmt, ...) {
+  size_t len = 0;
+  va_list ap;
+  va_start(ap, fmt);
+  len = mg_ws_vprintf(c, op, fmt, ap);
+  va_end(ap);
+  return len;
+}
+
 static void ws_handshake(struct mg_connection *c, const struct mg_str *wskey,
                          const struct mg_str *wsproto, const char *fmt,
                          va_list ap) {
diff --git a/mongoose.h b/mongoose.h
index 02910e45..fbe26f23 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -1178,6 +1178,8 @@ void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
                    const char *fmt, ...);
 size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);
 size_t mg_ws_wrap(struct mg_connection *, size_t len, int op);
+size_t mg_ws_printf(struct mg_connection *c, int op, const char *fmt, ...);
+size_t mg_ws_vprintf(struct mg_connection *c, int op, const char *fmt, va_list);
 
 
 
diff --git a/src/ws.c b/src/ws.c
index fed44aa0..243652b5 100644
--- a/src/ws.c
+++ b/src/ws.c
@@ -13,6 +13,24 @@ struct ws_msg {
   size_t data_len;
 };
 
+size_t mg_ws_vprintf(struct mg_connection *c, int op, const char *fmt,
+                     va_list ap) {
+  char mem[256], *buf = mem;
+  size_t len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
+  len = mg_ws_send(c, buf, len, op);
+  if (buf != mem) free(buf);
+  return len;
+}
+
+size_t mg_ws_printf(struct mg_connection *c, int op, const char *fmt, ...) {
+  size_t len = 0;
+  va_list ap;
+  va_start(ap, fmt);
+  len = mg_ws_vprintf(c, op, fmt, ap);
+  va_end(ap);
+  return len;
+}
+
 static void ws_handshake(struct mg_connection *c, const struct mg_str *wskey,
                          const struct mg_str *wsproto, const char *fmt,
                          va_list ap) {
diff --git a/src/ws.h b/src/ws.h
index a2ae4157..628723e5 100644
--- a/src/ws.h
+++ b/src/ws.h
@@ -21,3 +21,5 @@ void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
                    const char *fmt, ...);
 size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);
 size_t mg_ws_wrap(struct mg_connection *, size_t len, int op);
+size_t mg_ws_printf(struct mg_connection *c, int op, const char *fmt, ...);
+size_t mg_ws_vprintf(struct mg_connection *c, int op, const char *fmt, va_list);