diff --git a/src/story_base.h b/src/story_base.h
--- a/src/story_base.h
+++ b/src/story_base.h
@@ -113,7 +113,7 @@ enum StoryPageButtonCursor : byte {
  * @param wc The value to check
  * @return true if the given value is a valid StoryPageButtonCursor.
  */
-static inline bool IsValidStoryPageButtonCursor(StoryPageButtonCursor cursor)
+inline bool IsValidStoryPageButtonCursor(StoryPageButtonCursor cursor)
 {
 	return cursor < SPBC_END;
 }