diff --git a/src/commands/CmdFill.cpp b/src/commands/CmdFill.cpp
index 74083ef7..dc3dce1e 100644
--- a/src/commands/CmdFill.cpp
+++ b/src/commands/CmdFill.cpp
@@ -62,7 +62,7 @@ int CmdFill (
     Interval to {from};
 
     database.deleteInterval (from);
-    autoFill (rules, database, filter, to);
+    autoFill (rules, database, to);
     validate (cli, rules, database, to);
     database.addInterval (to);
 
diff --git a/src/timew.h b/src/timew.h
index 3ded1d01..12ad379a 100644
--- a/src/timew.h
+++ b/src/timew.h
@@ -57,7 +57,7 @@ Interval                getLatestInterval (Database&);
 Range                   getFullDay        (const Datetime&);
 
 // validate.cpp
-void autoFill (const Rules&, Database&, const Interval&, Interval&);
+void autoFill (const Rules&, Database&, Interval&);
 void validate (const CLI& cli, const Rules& rules, Database&, Interval&);
 
 // init.cpp
diff --git a/src/validate.cpp b/src/validate.cpp
index 8cd0966f..b8a6e2fb 100644
--- a/src/validate.cpp
+++ b/src/validate.cpp
@@ -41,7 +41,6 @@
 void autoFill (
   const Rules& rules,
   Database& database,
-  const Interval& filter,
   Interval& interval)
 {
   // An empty filter allows scanning beyond interval.range.
@@ -200,7 +199,7 @@ void validate (
 
   // All validation performed here.
   if (findHint (cli, ":fill"))
-    autoFill (rules, database, filter, interval);
+    autoFill (rules, database, interval);
 
   autoAdjust (findHint (cli, ":adjust"), rules, database, interval);