diff --git a/libraries/AP_InertialSensor/AP_InertialSensor_L3G4200D.cpp b/libraries/AP_InertialSensor/AP_InertialSensor_L3G4200D.cpp
index f2493d0d0a..e9bde0553a 100644
--- a/libraries/AP_InertialSensor/AP_InertialSensor_L3G4200D.cpp
+++ b/libraries/AP_InertialSensor/AP_InertialSensor_L3G4200D.cpp
@@ -279,6 +279,7 @@ bool AP_InertialSensor_L3G4200D::_accumulate(void)
             }
         }
     }
+    return true;
 }
 
 #endif