diff --git a/src/option.h b/src/option.h
index 460e300..e962ba3 100644
--- a/src/option.h
+++ b/src/option.h
@@ -318,6 +318,7 @@
 #endif
 #ifdef FEAT_MBYTE
 EXTERN char_u	*p_ambw;	/* 'ambiwidth' */
+EXTERN char_u	*p_emoji;	/* 'emoji' */
 #endif
 #if defined(FEAT_GUI) && defined(MACOS_X)
 EXTERN int	*p_antialias;	/* 'antialias' */