diff --git a/src/tea3.rs b/src/tea3.rs
index 8aee299..5a3c6b9 100644
--- a/src/tea3.rs
+++ b/src/tea3.rs
@@ -189,18 +189,18 @@ fn e(byte1: u8, byte2: u8) -> [u8; 8] {
 
 /// BP.
 /// input bits numbered: 01234567 (bit 0 LSB),
-/// output: 37612405.
+/// output: 50421673.
 fn bp(x: u8) -> u8 {
     let bit = |pos: u8| -> u8 { (x >> pos) & 1 };
 
-    (bit(3) << 7)
-        | (bit(7) << 6)
-        | (bit(6) << 5)
-        | (bit(1) << 4)
-        | (bit(2) << 3)
-        | (bit(4) << 2)
-        | (bit(0) << 1)
-        | bit(5)
+    (bit(5) << 7)
+        | (bit(0) << 6)
+        | (bit(4) << 5)
+        | (bit(2) << 4)
+        | (bit(1) << 3)
+        | (bit(6) << 2)
+        | (bit(7) << 1)
+        | bit(3)
 }
 
 #[cfg(test)]
@@ -271,7 +271,7 @@ mod tests {
     fn test_bp() {
         let x = 0b10110010;
         let result = bp(x);
-        assert_eq!(result, 0b01010101);
+        assert_eq!(result, 0b10101010);
     }
 
     #[test]