diff --git a/include/mbedtls/aesni.h b/include/mbedtls/aesni.h
index 746baa0..7b16b4b 100644
--- a/include/mbedtls/aesni.h
+++ b/include/mbedtls/aesni.h
@@ -24,6 +24,12 @@
 #ifndef MBEDTLS_AESNI_H
 #define MBEDTLS_AESNI_H
 
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
 #include "aes.h"
 
 #define MBEDTLS_AESNI_AES      0x02000000u