diff --git a/Blimp/radio.cpp b/Blimp/radio.cpp
index fddce3e914dd21..8c2e5bc161eb63 100644
--- a/Blimp/radio.cpp
+++ b/Blimp/radio.cpp
@@ -120,7 +120,7 @@ void Blimp::set_throttle_and_failsafe(uint16_t throttle_pwm)
     } else {
         // we have a good throttle so reduce failsafe counter
         failsafe.radio_counter--;
-        if ( failsafe.radio_counter <= 0 ) {
+        if ( failsafe.radio_counter < 0 ) {
             failsafe.radio_counter = 0;   // check to ensure we don't underflow the counter
 
             // disengage failsafe after three (nearly) consecutive valid throttle values