diff --git a/Inst_eddies/inst_eddies.py.in b/Inst_eddies/inst_eddies.py.in
index 02a878a2ca0aa4869cf578340f56c7255417587c..695104ff7386efa8bc40278692e43d97a16b29ef 100644
--- a/Inst_eddies/inst_eddies.py.in
+++ b/Inst_eddies/inst_eddies.py.in
@@ -47,6 +47,8 @@ def loop_inst_eddies(files, bbox, d, my_slice):
     writer = csv.writer(perf_report, lineterminator = "\n")
     writer.writerow(["", "s", "s"]) # units
     writer.writerow(["date", "elapsed NCO", "elapsed Fortran"]) # long names
+
+    # Short names (without blanks):
     writer.writerow(["date", "elapsed_NCO", "elapsed_Fortran"])
 
     for nc_file in files: