diff --git a/src/crypto/sha3/Makefile.am b/src/crypto/sha3/Makefile.am
index 4de670746..d0b496b75 100644
--- a/src/crypto/sha3/Makefile.am
+++ b/src/crypto/sha3/Makefile.am
@@ -6,7 +6,9 @@ if USE_SHA3_OPENSSL
 libsha3_la_SOURCES += sha3_ossl.c
 endif
 if USE_AVX2_INSTRUCTIONS
+if USE_AES_INSTRUCTIONS
 libsha3_la_SOURCES += sha3x4.c
 endif
+endif
 
 sha3_c.c: fips202.c sp800-185.c
diff --git a/src/crypto/sha3/sha3.h b/src/crypto/sha3/sha3.h
index 11a5c2dc2..8e2eabe3a 100644
--- a/src/crypto/sha3/sha3.h
+++ b/src/crypto/sha3/sha3.h
@@ -499,7 +499,7 @@ void OQS_SHA3_cshake128_simple(uint8_t *output, size_t outlen, uint16_t cstm, co
 */
 void OQS_SHA3_cshake256_simple(uint8_t *output, size_t outlen, uint16_t cstm, const uint8_t *input, size_t inplen);
 
-#ifdef USE_AVX2_INSTRUCTIONS
+#if defined(USE_AVX2_INSTRUCTIONS) && defined(USE_AES_INSTRUCTIONS)
 /**
  * \brief Seed 4 parallel SHAKE-128 instances, and generate 4 arrays of pseudo-random bytes.
  *