diff --git a/libraries/AC_WPNav/AC_WPNav.h b/libraries/AC_WPNav/AC_WPNav.h
index 76d01d1ee9..d7c4b73105 100644
--- a/libraries/AC_WPNav/AC_WPNav.h
+++ b/libraries/AC_WPNav/AC_WPNav.h
@@ -30,7 +30,7 @@
 
 #define WPNAV_LEASH_LENGTH_MIN          100.0f      // minimum leash lengths in cm
 
-#if HAL_CPU_CLASS >= HAL_CPU_CLASS_75 || CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
+#if HAL_CPU_CLASS < HAL_CPU_CLASS_75 || CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
  # define WPNAV_LOITER_UPDATE_TIME      0.095f      // 10hz update rate on low speed CPUs (APM1, APM2)
  # define WPNAV_WP_UPDATE_TIME          0.095f      // 10hz update rate on low speed CPUs (APM1, APM2)
 #else