diff --git a/src/structs.h b/src/structs.h
index 5aceb59..a34fa66 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1358,7 +1358,9 @@
 #ifdef FEAT_INS_EXPAND
     char_u	*b_p_cpt;	/* 'complete' */
 #endif
+#ifdef FEAT_CRYPT
     long	b_p_cm;		/* 'cryptmethod' */
+#endif
 #ifdef FEAT_COMPL_FUNC
     char_u	*b_p_cfu;	/* 'completefunc' */
     char_u	*b_p_ofu;	/* 'omnifunc' */