diff --git a/libraries/AP_NMEA_Output/AP_NMEA_Output_config.h b/libraries/AP_NMEA_Output/AP_NMEA_Output_config.h
index d3164bb1a5..f8e44934de 100644
--- a/libraries/AP_NMEA_Output/AP_NMEA_Output_config.h
+++ b/libraries/AP_NMEA_Output/AP_NMEA_Output_config.h
@@ -5,5 +5,5 @@
 
 // Needs SerialManager + (AHRS or GPS)
 #ifndef HAL_NMEA_OUTPUT_ENABLED
-#define HAL_NMEA_OUTPUT_ENABLED HAL_GCS_ENABLED
+#define HAL_NMEA_OUTPUT_ENABLED BOARD_FLASH_SIZE>1024 && HAL_GCS_ENABLED
 #endif