diff --git a/sbin/hastd/hast.h b/sbin/hastd/hast.h
index b757994a19b5..381e19574e6b 100644
--- a/sbin/hastd/hast.h
+++ b/sbin/hastd/hast.h
@@ -259,7 +259,4 @@ struct hast_resource {
 struct hastd_config *yy_config_parse(const char *config, bool exitonerror);
 void yy_config_free(struct hastd_config *config);
 
-void yyerror(const char *);
-int yylex(void);
-
 #endif	/* !_HAST_H_ */
diff --git a/sbin/hastd/parse.y b/sbin/hastd/parse.y
index bd0690a02abf..6bfb537c79cb 100644
--- a/sbin/hastd/parse.y
+++ b/sbin/hastd/parse.y
@@ -75,6 +75,8 @@ static char depth1_provname[PATH_MAX];
 static char depth1_localpath[PATH_MAX];
 static int depth1_metaflush;
 
+extern void yyerror(const char *);
+extern int yylex(void);
 extern void yyrestart(FILE *);
 
 static int isitme(const char *name);
diff --git a/sbin/hastd/token.l b/sbin/hastd/token.l
index a20efd7d0b30..e8f676094ef0 100644
--- a/sbin/hastd/token.l
+++ b/sbin/hastd/token.l
@@ -42,6 +42,9 @@ int depth;
 int lineno;
 
 #define	DP	do { } while (0)
+#define	YY_DECL	int yylex(void)
+
+extern int yylex(void);
 %}
 
 %option noinput