diff --git a/api/layout/paths.go b/api/layout/paths.go
index 6366dfce..07d2aa2b 100644
--- a/api/layout/paths.go
+++ b/api/layout/paths.go
@@ -117,7 +117,7 @@ func ParseTileIndexPartial(index string) (uint64, uint8, error) {
 		var err error
 		w64, err := strconv.ParseUint(indexPaths[len(indexPaths)-1], 10, 64)
 		if err != nil || w64 < 1 || w64 >= TileWidth {
-			return 0, 0, fmt.Errorf("failed to parse tile index")
+			return 0, 0, fmt.Errorf("failed to parse tile width")
 		}
 		w = uint8(w64)
 		indexPaths[len(indexPaths)-2] = strings.TrimSuffix(indexPaths[len(indexPaths)-2], ".p")
diff --git a/api/layout/tile.go b/api/layout/tile.go
index 4a38f08b..ded1c6da 100644
--- a/api/layout/tile.go
+++ b/api/layout/tile.go
@@ -20,7 +20,7 @@ const (
 	TileHeight = 8
 	// TileWidth is the maximum number of hashes which can be present in the bottom row of a tile.
 	TileWidth = 1 << TileHeight
-	// EntryBundleWirth is the maximum number of entries which can be present in an EntryBundle.
+	// EntryBundleWidth is the maximum number of entries which can be present in an EntryBundle.
 	// This is defined to be the same as the width of the node tiles by tlog-tile spec.
 	EntryBundleWidth = TileWidth
 )