diff --git a/libraries/AP_AIS/AP_AIS.h b/libraries/AP_AIS/AP_AIS.h
index fa1f7795dc..f8a2f30b86 100644
--- a/libraries/AP_AIS/AP_AIS.h
+++ b/libraries/AP_AIS/AP_AIS.h
@@ -14,15 +14,7 @@
  */
 #pragma once
 
-#include <AP_HAL/AP_HAL_Boards.h>
-
-#ifndef AP_AIS_ENABLED
-#if BOARD_FLASH_SIZE <= 1024
-    #define AP_AIS_ENABLED 0
-#else
-    #define AP_AIS_ENABLED 2
-#endif
-#endif
+#include "AP_AIS_config.h"
 
 #if AP_AIS_ENABLED
 // 0 fully disabled and compiled out
diff --git a/libraries/AP_AIS/AP_AIS_config.h b/libraries/AP_AIS/AP_AIS_config.h
new file mode 100644
index 0000000000..d80b65934d
--- /dev/null
+++ b/libraries/AP_AIS/AP_AIS_config.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef AP_AIS_ENABLED
+#if BOARD_FLASH_SIZE <= 1024
+    #define AP_AIS_ENABLED 0
+#else
+    #define AP_AIS_ENABLED 2
+#endif
+#endif
diff --git a/libraries/AP_AIS/LogStructure.h b/libraries/AP_AIS/LogStructure.h
index b55656fae1..2eeb701f91 100644
--- a/libraries/AP_AIS/LogStructure.h
+++ b/libraries/AP_AIS/LogStructure.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AP_Logger/LogStructure.h>
-#include "AP_AIS.h"
+#include "AP_AIS_config.h"
 
 #define LOG_IDS_FROM_AIS \
     LOG_AIS_RAW_MSG,\