diff --git a/sendmail/conf.c b/sendmail/conf.c

index c73334e..cbb9c76 100644

--- a/sendmail/conf.c

+++ b/sendmail/conf.c

@@ -986,7 +986,7 @@ switch_map_find(service, maptype, mapreturn)

 				if (p != NULL)

 					*p = '\0';

 #ifndef SM_NSSWITCH_DELIMS

-# define SM_NSSWITCH_DELIMS	" \t"

+# define SM_NSSWITCH_DELIMS	" \t:"

 #endif /* SM_NSSWITCH_DELIMS */

 				p = strpbrk(buf, SM_NSSWITCH_DELIMS);

 				if (p != NULL)