diff --git a/bin/datastore.py b/bin/datastore.py
index e010dd5..4f33648 100644
--- a/bin/datastore.py
+++ b/bin/datastore.py
@@ -186,7 +186,7 @@ class Datastore:
 			# We do not commit if we've been passed a cursor, instead
 			# we assume that we are in the middle of a transaction
 
-	def save_preplots(self, lines, path, preplot_class, epsg = 0):
+	def save_preplots(self, lines, filepath, preplot_class, epsg = 0):
 		"""
 		Save preplot data.
 
@@ -195,7 +195,7 @@ class Datastore:
 		lines (iterable): should be a collection of lines returned from
 		one of the preplot-reading functions (see preplots.py).
 
-		path (string): the full path to the preplot file from where the lines
+		filepath (string): the full path to the preplot file from where the lines
 		have been read. It will be added to the survey's `file` table so that
 		it can be monitored for changes.
 
@@ -209,7 +209,7 @@ class Datastore:
 		with self.conn.cursor() as cursor:
 			cursor.execute("BEGIN;")
 
-			hash = self.add_file(path, cursor)
+			hash = self.add_file(filepath, cursor)
 			count=0
 			for line in lines:
 				count += 1