*** a/src/pl/plperl/plperl.c
--- b/src/pl/plperl/plperl.c
***************
*** 700,706 **** plperl_trusted_init(void)
  		if (!isGV_with_GP(sv) || !GvCV(sv))
  			continue;
  		SvREFCNT_dec(GvCV(sv)); /* free the CV */
! 		GvCV(sv) = NULL;		/* prevent call via GV */
  	}
  	hv_clear(stash);
  	/* invalidate assorted caches */
--- 700,706 ----
  		if (!isGV_with_GP(sv) || !GvCV(sv))
  			continue;
  		SvREFCNT_dec(GvCV(sv)); /* free the CV */
! 		GvCV_set(sv, NULL);		/* prevent call via GV */
  	}
  	hv_clear(stash);
  	/* invalidate assorted caches */
*** a/src/pl/plperl/plperl.h
--- b/src/pl/plperl/plperl.h
***************
*** 43,48 ****
--- 43,53 ----
  #undef bool
  #endif
  
+ /* supply GvCV_set if it's missing - ppport.h doesn't supply it, unfortunately */
+ #ifndef GvCV_set
+ #define GvCV_set(gv, cv)		(GvCV(gv) = cv)
+ #endif
+ 
  /* routines from spi_internal.c */
  int			spi_DEBUG(void);
  int			spi_LOG(void);