diff --git a/library/aes.c b/library/aes.c
index 85de815..9bbe598 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -36,8 +36,8 @@
 
 #if defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
 #if !((defined(MBEDTLS_ARCH_IS_ARM64) && defined(MBEDTLS_AESCE_C)) || \
-      (defined(MBEDTLS_ARCH_IS_X64)   && defined(MBEDTLS_AESNI_C)) || \
-      (defined(MBEDTLS_ARCH_IS_X86)   && defined(MBEDTLS_AESNI_C)))
+    (defined(MBEDTLS_ARCH_IS_X64)   && defined(MBEDTLS_AESNI_C)) || \
+    (defined(MBEDTLS_ARCH_IS_X86)   && defined(MBEDTLS_AESNI_C)))
 #error "MBEDTLS_AES_USE_HARDWARE_ONLY defined, but not all prerequisites"
 #endif
 #endif