diff --git a/libraries/AP_HAL_Linux/RCInput_RPI.cpp b/libraries/AP_HAL_Linux/RCInput_RPI.cpp
index f4e14175da..4d36c8367c 100644
--- a/libraries/AP_HAL_Linux/RCInput_RPI.cpp
+++ b/libraries/AP_HAL_Linux/RCInput_RPI.cpp
@@ -476,7 +476,7 @@ void RCInput_RPI::init()
 void RCInput_RPI::_timer_tick()
 {
     int j;
-    void *x;
+    void *x = nullptr;
     uint64_t signal_states(0);
 
     //Now we are getting address in which DMAC is writing at current moment