diff --git a/projects/rocprofiler-compute/src/utils/perfagg.py b/projects/rocprofiler-compute/src/utils/perfagg.py
index 95b1d9c98d..e965b784c6 100755
--- a/projects/rocprofiler-compute/src/utils/perfagg.py
+++ b/projects/rocprofiler-compute/src/utils/perfagg.py
@@ -107,7 +107,9 @@ def join_prof(workload_dir, join_type, log_file, verbose, out=None):
             _df["key"] = _df.KernelName + " - " + key.astype(str)
         elif join_type == "grid":
             key = _df.groupby(["KernelName", "grd"]).cumcount()
-            _df["key"] = _df.KernelName + " - " + _df.grd.astype(str) + " - " + key.astype(str)
+            _df["key"] = (
+                _df.KernelName + " - " + _df.grd.astype(str) + " - " + key.astype(str)
+            )
         else:
             print("ERROR: Unrecognized --join-type")
             sys.exit(1)