diff --git a/tools/xfsslower.py b/tools/xfsslower.py
index da70c57..c70721a 100755
--- a/tools/xfsslower.py
+++ b/tools/xfsslower.py
@@ -173,8 +173,15 @@
 
     // calculate delta
     u64 ts = bpf_ktime_get_ns();
-    u64 delta_us = (ts - valp->ts) / 1000;
+    u64 delta_us = ts - valp->ts;
     entryinfo.delete(&id);
+
+    // Skip entries with backwards time: temp workaround for #728
+    if ((s64) delta_us < 0)
+        return 0;
+
+    delta_us /= 1000;
+
     if (FILTER_US)
         return 0;