diff --git a/radio/src/pulses/pxx2.cpp b/radio/src/pulses/pxx2.cpp
index 5b6324613..e9e7bbca6 100644
--- a/radio/src/pulses/pxx2.cpp
+++ b/radio/src/pulses/pxx2.cpp
@@ -38,7 +38,7 @@ uint8_t Pxx2Pulses::addFlag0(uint8_t module)
 
 void Pxx2Pulses::addFlag1(uint8_t module)
 {
-  uint8_t flag1 = g_model.moduleData[module].rfProtocol << 6;
+  uint8_t flag1 = g_model.moduleData[module].rfProtocol << 4;
   Pxx2Transport::addByte(flag1);
 }