diff --git a/crypto/evp/pbkdf_test.cc b/crypto/evp/pbkdf_test.cc
index a6fe3dc1..438ab644 100644
--- a/crypto/evp/pbkdf_test.cc
+++ b/crypto/evp/pbkdf_test.cc
@@ -15,7 +15,6 @@
 #include <stdio.h>
 #include <string.h>
 
-#include <openssl/bio.h>
 #include <openssl/crypto.h>
 #include <openssl/digest.h>
 #include <openssl/err.h>