diff --git a/diff_packages.py b/diff_packages.py
index 57badcb..b0433ef 100644
--- a/diff_packages.py
+++ b/diff_packages.py
@@ -21,7 +21,7 @@ def get_last_boot():
                 )
 
 
-def get_snapshot__after_datetime(start: datetime.datetime):
+def get_snapshot_after_datetime(start: datetime.datetime):
     with subprocess.Popen(
         ["snapper", "--utc", "--iso", "--jsonout", "list", "-t", "pre-post"],
         stdout=subprocess.PIPE,
@@ -67,7 +67,7 @@ def diff_tempfiles(old, new):
 
 
 if __name__ == "__main__":
-    snapshot_data = get_snapshot__after_datetime(get_last_boot())
+    snapshot_data = get_snapshot_after_datetime(get_last_boot())
     snapshot_root = get_snapshot_path(snapshot_data)
     db_root = "var/lib/pacman"
     old = write_pacman_output(snapshot_root / db_root)