diff --git a/hal/zuart.cpp b/hal/zuart.cpp
index da13c58..48dff00 100644
--- a/hal/zuart.cpp
+++ b/hal/zuart.cpp
@@ -144,6 +144,11 @@ bool ZUART::dataIsReady() {
   if (m_dataIsReady) {
     return true;
   }
+
+  if (!(HAL_UART_GetState(m_huart) & (0x01 << 1))) {
+    HAL_UART_Receive_IT(m_huart, &onebyte, 1);
+  }
+
   if (!m_dataIsReady && m_rxBufferPos != 0) {
     if (ifly_has_passedms(m_lastRxTime) > (uint32_t)m_rxovertime_ms) {
       m_dataIsReady = true;