diff --git a/tests/libtest/lib599.c b/tests/libtest/lib599.c
index 354e88704..6b092677a 100644
--- a/tests/libtest/lib599.c
+++ b/tests/libtest/lib599.c
@@ -23,8 +23,6 @@
 
 #include "memdebug.h"
 
-static double dl;
-
 static int progress_callback(void *clientp, double dltotal,
                              double dlnow, double ultotal, double ulnow)
 {
@@ -32,8 +30,6 @@ static int progress_callback(void *clientp, double dltotal,
   (void)ulnow;
   (void)ultotal;
 
-  dl = dltotal;
-
   if((dltotal > 0.0) && (dlnow > dltotal)) {
     /* this should not happen with test case 599 */
     printf("%.0f > %.0f !!\n", dltotal, dlnow);