diff --git a/src/globals.h b/src/globals.h
index e486b6e..7829f2a 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1699,6 +1699,7 @@
 EXTERN char e_readonlysbx[]	INIT(= N_("E794: Cannot set variable in the sandbox: \"%s\""));
 EXTERN char e_stringreq[]	INIT(= N_("E928: String required"));
 EXTERN char e_numberreq[]	INIT(= N_("E889: Number required"));
+EXTERN char e_boolreq[]		INIT(= N_("E839: Number required"));
 EXTERN char e_emptykey[]	INIT(= N_("E713: Cannot use empty key for Dictionary"));
 EXTERN char e_dictreq[]		INIT(= N_("E715: Dictionary required"));
 EXTERN char e_listidx[]		INIT(= N_("E684: list index out of range: %ld"));