diff --git a/libraries/AP_Common/AP_Common.h b/libraries/AP_Common/AP_Common.h
index 76db086c21..f9632eec01 100644
--- a/libraries/AP_Common/AP_Common.h
+++ b/libraries/AP_Common/AP_Common.h
@@ -88,6 +88,7 @@
   bool. Bitnumber starts at 0 for the first bit
  */
 #define BIT_IS_SET(value, bitnumber) (((value) & (1U<<(bitnumber))) != 0)
+#define BIT_IS_SET_64(value, bitnumber) (((value) & (uint64_t(1U)<<(bitnumber))) != 0)
 
 // get high or low bytes from 2 byte integer
 #define LOWBYTE(i) ((uint8_t)(i))