diff --git a/src/p.rs b/src/p.rs
index 3ad0209..4fedb08 100644
--- a/src/p.rs
+++ b/src/p.rs
@@ -37,7 +37,7 @@
 //!
 //! ``` text
 //! a   = 0b1011 = 1*x^3 + 0*x^2 + 1*x^1 + 1*x^0
-//! b   = 0b1101 = 0*x^3 + 1*x^2 + 0*x^1 + 1*x^0
+//! b   = 0b1101 = 1*x^3 + 1*x^2 + 0*x^1 + 1*x^0
 //!
 //! a+b = ((1+1)%2)*x^3 + ((0+1)%2)*x^2 + ((1+0)%2)*x^1 + ((1+1)%2)*x^0
 //!     = 0*x^3 + 1*x^2 + 1*x^1 + 0*x^0