diff --git a/radio/src/pulses/pulses.cpp b/radio/src/pulses/pulses.cpp
index a6888270f..9086367ad 100755
--- a/radio/src/pulses/pulses.cpp
+++ b/radio/src/pulses/pulses.cpp
@@ -111,7 +111,7 @@ uint8_t getModuleType(uint8_t module)
 
 uint8_t getRequiredProtocol(uint8_t module)
 {
-  uint8_t protocol;
+  uint8_t protocol = PROTOCOL_CHANNELS_UNINITIALIZED;
 
   switch (getModuleType(module)) {
     case MODULE_TYPE_PPM: