diff --git a/libraries/SRV_Channel/SRV_Channel.h b/libraries/SRV_Channel/SRV_Channel.h
index e19c52a4bf..e4778b2773 100644
--- a/libraries/SRV_Channel/SRV_Channel.h
+++ b/libraries/SRV_Channel/SRV_Channel.h
@@ -538,9 +538,8 @@ public:
         }
         return SRV_Channel::Aux_servo_function_t((SRV_Channel::k_motor9+(channel-8)));
     }
-    
-    static void cork();
 
+    void cork();
     void push();
 
     // disable PWM output to a set of channels given by a mask. This is used by the AP_BLHeli code
diff --git a/libraries/SRV_Channel/SRV_Channels.cpp b/libraries/SRV_Channel/SRV_Channels.cpp
index 3ef0c7e343..c1fda6226c 100644
--- a/libraries/SRV_Channel/SRV_Channels.cpp
+++ b/libraries/SRV_Channel/SRV_Channels.cpp
@@ -545,11 +545,12 @@ void SRV_Channels::zero_rc_outputs()
      * send an invalid signal to all channels to prevent
      * undesired/unexpected behavior
      */
-    cork();
+    auto &srv = AP::srv();
+    srv.cork();
     for (uint8_t i=0; i<NUM_SERVO_CHANNELS; i++) {
         hal.rcout->write(i, 0);
     }
-    AP::srv().push();
+    srv.push();
 }
 
 /*