diff --git a/contrib/pgcrypto/imath.c b/contrib/pgcrypto/imath.c
index 6936d2cdca..88ced719d5 100644
--- a/contrib/pgcrypto/imath.c
+++ b/contrib/pgcrypto/imath.c
@@ -3373,7 +3373,7 @@ s_udiv_knuth(mp_int u, mp_int v)
 		 * decrease qhat one more time before we get a value that is smaller
 		 * than r.
 		 *
-		 * This way is less efficent than Knuth becuase we do more multiplies,
+		 * This way is less efficent than Knuth because we do more multiplies,
 		 * but we do not need to worry about underflow this way.
 		 */
 		/* t = qhat * v */