diff --git a/crates/editor/src/editor.rs b/crates/editor/src/editor.rs
index f6fc89de2f..742541293e 100644
--- a/crates/editor/src/editor.rs
+++ b/crates/editor/src/editor.rs
@@ -1079,7 +1079,7 @@ impl CopilotState {
         match direction {
             Direction::Prev => {
                 self.active_completion_index = if self.active_completion_index == 0 {
-                    self.completions.len() - 1
+                    self.completions.len().saturating_sub(1)
                 } else {
                     self.active_completion_index - 1
                 };