diff --git a/library/aesce.c b/library/aesce.c
index 4cbe8b0..ff8c2e0 100644
--- a/library/aesce.c
+++ b/library/aesce.c
@@ -49,15 +49,21 @@
 #if defined(MBEDTLS_HAVE_ARM64)
 
 /* Compiler version checks. */
-#if defined(__clang__) && (__clang_major__ < 4)
-#   error "Minimum version of Clang for MBEDTLS_AESCE_C is 4.0."
-#elif defined(__GNUC__) && (__GNUC__ < 6)
-#   error "Minimum version of GCC for MBEDTLS_AESCE_C is 6.0."
-#elif defined(_MSC_VER) && (_MSC_VER < 1929)
+#if defined(__clang__)
+#   if __clang_major__ < 4
+#       error "Minimum version of Clang for MBEDTLS_AESCE_C is 4.0."
+#   endif
+#elif defined(__GNUC__)
+#   if __GNUC__ < 6
+#       error "Minimum version of GCC for MBEDTLS_AESCE_C is 6.0."
+#   endif
+#elif defined(_MSC_VER)
 /* TODO: We haven't verified MSVC from 1920 to 1928. If someone verified that,
  *       please update this and document of `MBEDTLS_AESCE_C` in
  *       `mbedtls_config.h`. */
-#   error "Minimum version of MSVC for MBEDTLS_AESCE_C is 2019 version 16.11.2."
+#   if _MSC_VER < 1929
+#       error "Minimum version of MSVC for MBEDTLS_AESCE_C is 2019 version 16.11.2."
+#   endif
 #endif
 
 #if !defined(__ARM_FEATURE_AES) || defined(MBEDTLS_ENABLE_ARM_CRYPTO_EXTENSIONS_COMPILER_FLAG)