diff --git a/dwarves_fprintf.c b/dwarves_fprintf.c
index ef8b82bd..3348aae8 100644
--- a/dwarves_fprintf.c
+++ b/dwarves_fprintf.c
@@ -1861,7 +1861,7 @@ static size_t __class__fprintf(struct class *class, const struct cu *cu,
 		}
 		printed += fprintf(fp, " */\n");
 	}
-	cacheline = (cconf.base_offset + type->size) % conf_fprintf__cacheline_size(conf);
+	cacheline = (cconf.base_offset + type->size) % conf_fprintf__cacheline_size(&cconf);
 	if (cacheline != 0)
 		printed += fprintf(fp, "%.*s/* last cacheline: %u bytes */\n",
 				   cconf.indent, tabs,