diff --git a/src/tpm12/tpm_crypto.c b/src/tpm12/tpm_crypto.c
index 9fb4fcef..91876eb0 100644
--- a/src/tpm12/tpm_crypto.c
+++ b/src/tpm12/tpm_crypto.c
@@ -47,7 +47,9 @@
 #include <openssl/crypto.h>
 #include <openssl/rand.h>
 #include <openssl/sha.h>
-#include <openssl/engine.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/rsa.h>
 
 #include "tpm_cryptoh.h"
 #include "tpm_debug.h"