diff --git a/src/option.h b/src/option.h
index b5f7d47..b7f1bd9 100644
--- a/src/option.h
+++ b/src/option.h
@@ -391,6 +391,7 @@
 EXTERN char_u	*p_cpo;		/* 'cpoptions' */
 #ifdef FEAT_CSCOPE
 EXTERN char_u	*p_csprg;	/* 'cscopeprg' */
+EXTERN int	p_csre;		/* 'cscoperelative' */
 # ifdef FEAT_QUICKFIX
 EXTERN char_u	*p_csqf;	/* 'cscopequickfix' */
 #  define	CSQF_CMDS   "sgdctefi"