diff --git a/src/level.rs b/src/level.rs
index 6c62ddb..1a2b097 100644
--- a/src/level.rs
+++ b/src/level.rs
@@ -80,15 +80,15 @@ impl Level {
                 break;
             }
         }
-        for x_r in (max(x - 2, 0)..x).rev() {
-            self.discovered[x_r][y] = true;
-            if self.structure[x_r][y] == LevelElement::Wall {
+        for x_r in (max(x, 2)..x + 2).rev() {
+            self.discovered[x_r - 2][y] = true;
+            if self.structure[x_r - 2][y] == LevelElement::Wall {
                 break;
             }
         }
-        for y_r in (max(y - 2, 0)..y).rev() {
-            self.discovered[x][y_r] = true;
-            if self.structure[x][y_r] == LevelElement::Wall {
+        for y_r in (max(y, 2)..y + 2).rev() {
+            self.discovered[x][y_r - 2] = true;
+            if self.structure[x][y_r - 2] == LevelElement::Wall {
                 break;
             }
         }