diff --git a/ipmitool/src/plugins/lanplus/lanplus_crypt_impl.c b/ipmitool/src/plugins/lanplus/lanplus_crypt_impl.c
index 468189f..e0539bf 100644
--- a/ipmitool/src/plugins/lanplus/lanplus_crypt_impl.c
+++ b/ipmitool/src/plugins/lanplus/lanplus_crypt_impl.c
@@ -39,6 +39,7 @@
 #include <openssl/hmac.h>
 #include <openssl/evp.h>
 #include <openssl/rand.h>
+#include <openssl/err.h>
 #include <assert.h>