diff --git a/src/protocols/RTTY.h b/src/protocols/RTTY.h
index 06aeac55..60270429 100644
--- a/src/protocols/RTTY.h
+++ b/src/protocols/RTTY.h
@@ -147,7 +147,7 @@ class RTTYClient {
     uint8_t _encoding;
     uint32_t _base;
     uint32_t _shift;
-    uint16_t _bitDuration;
+    uint32_t _bitDuration;
     uint8_t _dataBits;
     uint8_t _stopBits;