diff --git a/Modules/_sha3/sha3module.c b/Modules/_sha3/sha3module.c
index bfa96616df0..bffd177c0e7 100644
--- a/Modules/_sha3/sha3module.c
+++ b/Modules/_sha3/sha3module.c
@@ -57,6 +57,8 @@
   typedef uint64_t UINT64;
   typedef unsigned char UINT8;
 #endif
+// kcp/KeccakP-1600-opt64.c doesn't need to define UINT8
+#define NOT_PYTHON 0
 
 /* replacement for brg_endian.h */
 #define IS_LITTLE_ENDIAN 1234
@@ -69,7 +71,7 @@
 #endif
 
 /* Prevent bus errors on platforms requiring aligned accesses such ARM. */
-#if HAVE_ALIGNED_REQUIRED && !defined(NO_MISALIGNED_ACCESSES)
+#if defined(HAVE_ALIGNED_REQUIRED) && !defined(NO_MISALIGNED_ACCESSES)
 #define NO_MISALIGNED_ACCESSES
 #endif