diff --git a/tests/rtl8139-test.c b/tests/rtl8139-test.c
index 3bff0e3..e749be3 100644
--- a/tests/rtl8139-test.c
+++ b/tests/rtl8139-test.c
@@ -86,7 +86,7 @@
         fatal("time too big %u\n", curr);
     }
     for (cnt = 0; ; ) {
-        clock_step(1 * NSEC_PER_SEC);
+        clock_step(1 * NANOSECONDS_PER_SECOND);
         prev = curr;
         curr = in_Timer();
 
@@ -125,7 +125,7 @@
     out_IntrStatus(0x4000);
     curr = in_Timer();
     out_TimerInt(curr + 0.5 * CLK);
-    clock_step(1 * NSEC_PER_SEC);
+    clock_step(1 * NANOSECONDS_PER_SECOND);
     out_Timer(0);
     if ((in_IntrStatus() & 0x4000) == 0) {
         fatal("we should have an interrupt here!\n");
@@ -137,7 +137,7 @@
     out_IntrStatus(0x4000);
     curr = in_Timer();
     out_TimerInt(curr + 0.5 * CLK);
-    clock_step(1 * NSEC_PER_SEC);
+    clock_step(1 * NANOSECONDS_PER_SECOND);
     out_TimerInt(0);
     if ((in_IntrStatus() & 0x4000) == 0) {
         fatal("we should have an interrupt here!\n");
@@ -148,7 +148,7 @@
     next = curr + 5.0 * CLK;
     out_TimerInt(next);
     for (cnt = 0; ; ) {
-        clock_step(1 * NSEC_PER_SEC);
+        clock_step(1 * NANOSECONDS_PER_SECOND);
         prev = curr;
         curr = in_Timer();
         diff = (curr-prev) & 0xffffffffu;