diff --git a/src/timesheet.rs b/src/timesheet.rs
index f53df77..38e90d0 100644
--- a/src/timesheet.rs
+++ b/src/timesheet.rs
@@ -83,8 +83,8 @@ impl TimeSheet {
      */
     pub fn shift_current(&mut self, minutes: i64) {
         let time = &mut self.times[self.selected].time;
-        let current_minute = time.minute() as i64;
-        *time += Duration::minutes(minutes - current_minute % minutes);
+        *time += Duration::minutes(minutes);
+        *time -= Duration::minutes(time.minute() as i64 % 5)
     }
 
     fn current(&self) -> &TimePoint {
diff --git a/src/tracc.rs b/src/tracc.rs
index a859273..c83be4a 100644
--- a/src/tracc.rs
+++ b/src/tracc.rs
@@ -69,7 +69,10 @@ impl Tracc {
                     }
                     Key::Char('a') | Key::Char('A') => self.set_mode(Mode::Insert)?,
                     Key::Char(' ') if self.focus == Focus::Top => self.todos.toggle_current(),
-                    Key::Char('-') if self.focus == Focus::Bottom => self.times.shift_current(-5),
+                    // Subtract only 1 minute because the number is truncated to the next multiple
+                    // of 5 afterwards, so this is effectively a -5.
+                    // See https://git.kageru.moe/kageru/tracc/issues/8
+                    Key::Char('-') if self.focus == Focus::Bottom => self.times.shift_current(-1),
                     Key::Char('+') if self.focus == Focus::Bottom => self.times.shift_current(5),
                     // dd
                     Key::Char('d') => {