diff --git a/rijndael.cpp b/rijndael.cpp
index fb934d08..37237be6 100644
--- a/rijndael.cpp
+++ b/rijndael.cpp
@@ -1345,17 +1345,17 @@ size_t Rijndael::Enc::AdvancedProcessBlocks(const byte *inBlocks, const byte *xo
 
 #endif
 
-#if CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
-
+#if CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86
 size_t Rijndael::Dec::AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const
 {
+#if CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
 	if (HasAESNI())
 		return AESNI_AdvancedProcessBlocks(AESNI_Dec_Block, AESNI_Dec_4_Blocks, (MAYBE_CONST __m128i *)(const void *)m_key.begin(), m_rounds, inBlocks, xorBlocks, outBlocks, length, flags);
+#endif
 
 	return BlockTransformation::AdvancedProcessBlocks(inBlocks, xorBlocks, outBlocks, length, flags);
 }
-
-#endif	// #if CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
+#endif	// CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86
 
 NAMESPACE_END
 
diff --git a/rijndael.h b/rijndael.h
index 5b334ffc..bdcf3ed3 100644
--- a/rijndael.h
+++ b/rijndael.h
@@ -69,7 +69,7 @@ class CRYPTOPP_DLL Rijndael : public Rijndael_Info, public BlockCipherDocumentat
 	{
 	public:
 		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
-#if CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
+#if CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86
 		size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
 #endif
 	};