diff --git a/libraries/AP_RCProtocol/AP_RCProtocol_SBUS.cpp b/libraries/AP_RCProtocol/AP_RCProtocol_SBUS.cpp
index 922ccc048c..54ddbdaeb6 100644
--- a/libraries/AP_RCProtocol/AP_RCProtocol_SBUS.cpp
+++ b/libraries/AP_RCProtocol/AP_RCProtocol_SBUS.cpp
@@ -170,7 +170,7 @@ void AP_RCProtocol_SBUS::process_pulse(uint32_t width_s0, uint32_t width_s1)
 // support byte input
 void AP_RCProtocol_SBUS::_process_byte(uint32_t timestamp_us, uint8_t b)
 {
-    const bool have_frame_gap = (timestamp_us - byte_input.last_byte_us >= 2000U);
+    const bool have_frame_gap = (timestamp_us - byte_input.last_byte_us >= 4000U);
     byte_input.last_byte_us = timestamp_us;
 
     if (have_frame_gap) {