diff --git a/src/libsysprof-gtk/sysprof-time-label.c b/src/libsysprof-gtk/sysprof-time-label.c
index b4d71cbf..fe2d45d9 100644
--- a/src/libsysprof-gtk/sysprof-time-label.c
+++ b/src/libsysprof-gtk/sysprof-time-label.c
@@ -166,9 +166,9 @@ sysprof_time_label_set_internal (SysprofTimeLabel *self,
 
       if (t == 0)
         str[0] = 0;
-      else if (t < SYSPROF_NSEC_PER_SEC/1000)
+      else if (t < 1000000)
         g_snprintf (str, sizeof str, "%.3lfμs", t/1000.);
-      else if (t < SYSPROF_NSEC_PER_SEC/1000000)
+      else if (t < SYSPROF_NSEC_PER_SEC)
         g_snprintf (str, sizeof str, "%.3lfms", t/1000000.);
       else
         g_snprintf (str, sizeof str, "%.3lfs", t/(double)SYSPROF_NSEC_PER_SEC);