diff --git a/contrib/pgcrypto/imath.c b/contrib/pgcrypto/imath.c
index 6936d2cdca..393646032a 100644
--- a/contrib/pgcrypto/imath.c
+++ b/contrib/pgcrypto/imath.c
@@ -723,7 +723,7 @@ mp_int_add(mp_int a, mp_int b, mp_int c)
 	else
 	{
 		/* Different signs -- subtract magnitudes, preserve sign of greater */
-		int			cmp = s_ucmp(a, b); /* magnitude comparision, sign ignored */
+		int			cmp = s_ucmp(a, b); /* magnitude comparison, sign ignored */
 
 		/*
 		 * Set x to max(a, b), y to min(a, b) to simplify later code. A