diff --git a/tools/profiling/microbenchmarks/bm_diff.py b/tools/profiling/microbenchmarks/bm_diff.py
index f1d29ba3c6410833037a23348227854430176e1b..0f54dbfe32e3fe0854da1986a91ec05c1ab92c19 100755
--- a/tools/profiling/microbenchmarks/bm_diff.py
+++ b/tools/profiling/microbenchmarks/bm_diff.py
@@ -125,6 +125,7 @@ def collect1(bm, cfg, ver):
          '--benchmark_out_format=json',
          '--benchmark_repetitions=%d' % (args.repetitions)
          ]
+  print cmd
   subprocess.check_call(cmd)
 
 build()