diff --git a/library/padlock.c b/library/padlock.c
index eeb6368..82b84bf 100644
--- a/library/padlock.c
+++ b/library/padlock.c
@@ -33,7 +33,7 @@
 
 #if defined(MBEDTLS_HAVE_X86)
 
-#if !defined(MBEDTLS_AES_HAS_NO_PLAIN_C)
+#if !defined(MBEDTLS_AES_DONT_USE_SOFTWARE_CRYPTO)
 /*
  * PadLock detection routine
  */