diff --git a/lib/nss_parse.y b/lib/nss_parse.y
index 4f67f08..e559696 100644
--- a/lib/nss_parse.y
+++ b/lib/nss_parse.y
@@ -45,6 +45,8 @@ struct nss_action act[NSS_STATUS_MAX];
 #define YYLTYPE_IS_TRIVIAL 0
 #endif
 
+unsigned int nss_automount_found;
+
 extern int nss_lineno;
 extern int nss_lex(void);
 extern FILE *nss_in;
@@ -183,10 +185,16 @@ int nsswitch_parse(struct list_head *list)
 
 	nss_in = nsswitch;
 
+	nss_automount_found = 0;
 	nss_list = list;
 	status = nss_parse();
 	nss_list = NULL;
 
+	/* No "automount" nsswitch entry, use "files" */
+	if (!nss_automount_found)
+		if (add_source(list, "files"))
+			status = 0;
+
 	pthread_cleanup_pop(1);
 	pthread_cleanup_pop(1);
 
diff --git a/lib/nss_tok.l b/lib/nss_tok.l
index 71d83b0..f96b47f 100644
--- a/lib/nss_tok.l
+++ b/lib/nss_tok.l
@@ -56,6 +56,8 @@ int nss_wrap(void);
 #define YY_MAIN 0
 #endif
 
+extern unsigned int nss_automount_found;
+
 %}
 
 %option nounput
@@ -85,6 +87,7 @@ other		[[:alnum:]@$%^&*()-+_":;?,<>./'{}~`]+
 %%
 
 ^{automount}: {
+	nss_automount_found = 1;
 	BEGIN(AUTOMOUNT);
 }