diff --git a/src/crypto/crypto_openssl.c b/src/crypto/crypto_openssl.c
index 791f588f7..ae0a001fa 100644
--- a/src/crypto/crypto_openssl.c
+++ b/src/crypto/crypto_openssl.c
@@ -636,6 +636,7 @@ struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
 	ctx = os_zalloc(sizeof(*ctx));
 	if (ctx == NULL)
 		return NULL;
+	HMAC_CTX_init(&ctx->ctx);
 
 #if OPENSSL_VERSION_NUMBER < 0x00909000
 	HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL);