diff --git a/singlepulse.py b/singlepulse.py
index 9ff9b5f..2c90002 100644
--- a/singlepulse.py
+++ b/singlepulse.py
@@ -327,6 +327,8 @@ def compute_snr_from_h5(h5_file, detrend_ft=True, mad_filter=True, save=False, s
 #%%
 for pulsar_dir in pulsar_dir_list:
     save_path = os.path.join(pulsar_dir, "calib-pngs", "")
+    if not os.path.exists(save_path):
+        os.makedirs(save_path)
     h5_dir = os.path.join(pulsar_dir,"cands","")
     print(h5_dir)
     h5_files = sorted(glob.glob(f"{h5_dir}*.h5"))