diff --git a/src/tetris.c b/src/tetris.c
index c842eb4..aec03e4 100644
--- a/src/tetris.c
+++ b/src/tetris.c
@@ -63,8 +63,8 @@ int tetris_intersect(const u8 *restrict const *restrict rows, u8 tetromino, uint
 	uint *end = pos + 8;
 	tetris_get_blocks(tetromino, pos);
 	for (; pos < end; pos += 2) {
-		if (*(pos + 0) >= TET_WIDTH) break;
-		if (*(pos + 1) >= TET_HEIGHT) break;
+		if (*(pos + 0) >= TET_WIDTH) return 2;
+		if (*(pos + 1) >= TET_HEIGHT) return 2;
 		if (rows[*(pos + 1)][*pos]) break;
 	}
 	return pos < end;
diff --git a/src/tetris.h b/src/tetris.h
index 28c4ae4..cfb137c 100644
--- a/src/tetris.h
+++ b/src/tetris.h
@@ -50,7 +50,8 @@ void tetris_init_rows(const u8 *restrict data, const u8 *restrict *restrict out)
  * Returns the amount of rows cleared. */
 int tetris_clear_rows(u8 *restrict *restrict rows) NONNULL((1));
 
-/* Checks if `tetromino` intersects at (`x`, `y`) in `rows`, returns `1` if so, `0` if not. */
+/* Checks if `tetromino` intersects at (`x`, `y`) in the data within `rows` or is out-of-bounds,
+ * returns `1` if it overlaps within `rows`, `2` if it is out-of-bounds, `0` if no intersection is found. */
 int tetris_intersect(const u8 *restrict const *restrict rows, u8 tetromino, uint x, uint y) NONNULL((1));
 
 /* Writes the blocks of `tetromino` to `rows` at position `x` and `y`. */