diff --git a/library/aesce.c b/library/aesce.c
index b46a0e4..d939e4a 100644
--- a/library/aesce.c
+++ b/library/aesce.c
@@ -66,7 +66,11 @@
 #   endif
 #endif
 
+#ifdef __ARM_NEON
 #include <arm_neon.h>
+#else
+#error "Target does not support NEON instructions"
+#endif
 
 #if !(defined(__ARM_FEATURE_CRYPTO) || defined(__ARM_FEATURE_AES)) || \
     defined(MBEDTLS_ENABLE_ARM_CRYPTO_EXTENSIONS_COMPILER_FLAG)
diff --git a/library/sha256.c b/library/sha256.c
index ae1b35c..104fa80 100644
--- a/library/sha256.c
+++ b/library/sha256.c
@@ -62,7 +62,13 @@
     defined(MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY)
 
 /* *INDENT-OFF* */
-#    include <arm_neon.h>
+
+#   ifdef __ARM_NEON
+#       include <arm_neon.h>
+#   else
+#       error "Target does not support NEON instructions"
+#   endif
+
 #    if !defined(__ARM_FEATURE_CRYPTO) || defined(MBEDTLS_ENABLE_ARM_CRYPTO_EXTENSIONS_COMPILER_FLAG)
 #      if defined(__clang__)
 #        if __clang_major__ < 4
diff --git a/library/sha512.c b/library/sha512.c
index fc7de74..3b68801 100644
--- a/library/sha512.c
+++ b/library/sha512.c
@@ -60,7 +60,11 @@
 #  if defined(MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT) || \
     defined(MBEDTLS_SHA512_USE_A64_CRYPTO_ONLY)
 /* *INDENT-OFF* */
-#    include <arm_neon.h>
+#   ifdef __ARM_NEON
+#       include <arm_neon.h>
+#   else
+#       error "Target does not support NEON instructions"
+#   endif
 /*
  * Best performance comes from most recent compilers, with intrinsics and -O3.
  * Must compile with -march=armv8.2-a+sha3, but we can't detect armv8.2-a, and