diff --git a/library/aes.c b/library/aes.c
index 2f52202..2880cdb 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -34,7 +34,9 @@
 #if defined(POLARSSL_AES_C)
 
 #include "polarssl/aes.h"
+#if defined(POLARSSL_PADLOCK_C)
 #include "polarssl/padlock.h"
+#endif
 
 /*
  * 32-bit integer manipulation macros (little endian)