diff -up at-3.1.12/at.c.noexport at-3.1.12/at.c

--- at-3.1.12/at.c.noexport	2011-06-10 14:21:04.000000000 +0200

+++ at-3.1.12/at.c	2011-06-10 14:22:54.247712577 +0200

@@ -391,8 +391,9 @@ writefile(time_t runtimer, char queue)

 	    unsigned int i;

 	    for (i = 0; i < sizeof(no_export) / sizeof(no_export[0]); i++) {

 		export = export

-		    && (strncmp(*atenv, no_export[i],

-				(size_t) (eqp - *atenv)) != 0);

+		    && ((((size_t) (eqp - *atenv)) != strlen(no_export[i]))

+			||(strncmp(*atenv, no_export[i],(size_t) (eqp - *atenv)) != 0)

+			);

 	    }

 	    eqp++;

 	}