diff --git a/src/sage/crypto/sbox.pyx b/src/sage/crypto/sbox.pyx
index bafe3703ceb..b9fff140ca2 100644
--- a/src/sage/crypto/sbox.pyx
+++ b/src/sage/crypto/sbox.pyx
@@ -252,7 +252,7 @@ cdef class SBox(SageObject):
             raise NotImplemented
 
         cdef SBox other = <SBox> rhs
-        return (self._S_list == other._S_list) and (self._big_endian == self._big_endian)
+        return (self._S_list == other._S_list) and (self._big_endian == other._big_endian)
 
     def __ne__(self, other):
         """