diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
new file mode 100644
index 15020c4..c0f9880
*** a/src/backend/utils/misc/guc.c
--- b/src/backend/utils/misc/guc.c
*************** add_placeholder_variable(const char *nam
*** 3929,3936 ****
  
  	gen->context = PGC_USERSET;
  	gen->group = CUSTOM_OPTIONS;
! 	gen->short_desc = "GUC placeholder variable";
! 	gen->flags = GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE | GUC_CUSTOM_PLACEHOLDER;
  	gen->vartype = PGC_STRING;
  
  	/*
--- 3929,3936 ----
  
  	gen->context = PGC_USERSET;
  	gen->group = CUSTOM_OPTIONS;
! 	gen->short_desc = "Custom variable.";
! 	gen->flags = GUC_NOT_IN_SAMPLE | GUC_CUSTOM_PLACEHOLDER;
  	gen->vartype = PGC_STRING;
  
  	/*