diff --git a/src/libcrypto.c b/src/libcrypto.c
index b24a18f8..c0a186e2 100644
--- a/src/libcrypto.c
+++ b/src/libcrypto.c
@@ -196,6 +196,7 @@ void evp_update(EVPCTX ctx, const void *data, unsigned long len)
 void evp_final(EVPCTX ctx, unsigned char *md, unsigned int *mdlen)
 {
     EVP_DigestFinal(ctx, md, mdlen);
+    EVP_MD_CTX_free(ctx);
 }
 #endif