diff --git a/tools/sof_perf_analyzer.py b/tools/sof_perf_analyzer.py
index 471ed773..42654fb4 100755
--- a/tools/sof_perf_analyzer.py
+++ b/tools/sof_perf_analyzer.py
@@ -106,6 +106,7 @@ def skip_to_first_trace(trace_item_gen: TraceItemGenerator):
         # The first trace must have a timestamp with integral part equals to 0.
         if int(item.timestamp) == 0:
             return item
+    return next(trace_item_gen)
 
 def make_trace_item(fileio: TextIO) -> TraceItemGenerator:
     '''Filter and parse a line of trace in string form into TraceItem object, for example:
@@ -263,10 +264,10 @@ def print_perf_info():
         print(stats)
 
     if args.out2csv is not None:
-        stats.to_csv(args.out2csv, sep=',', float_format='%.3f', index=False)
+        stats.to_csv(args.out2csv, sep=',', float_format='{:.3f}'.format, index=False)
 
     if args.out2html is not None:
-        stats.to_html(args.out2html, float_format='%.3f', index=False)
+        stats.to_html(args.out2html, float_format='{:.3f}'.format, index=False)
 
 def parse_args():
     '''Parse command line arguments'''