diff --git a/nassl/_nassl/nassl_OCSP_RESPONSE.c b/nassl/_nassl/nassl_OCSP_RESPONSE.c
index f316d29..dbc70a0 100755
--- a/nassl/_nassl/nassl_OCSP_RESPONSE.c
+++ b/nassl/_nassl/nassl_OCSP_RESPONSE.c
@@ -139,6 +139,7 @@ static PyObject* nassl_OCSP_RESPONSE_basic_verify(nassl_OCSP_RESPONSE_Object *se
 
     verifyRes = OCSP_basic_verify(basicResp, NULL, trustedCAs, 0);
     OCSP_BASICRESP_free(basicResp);
+    X509_STORE_free(trustedCAs);
     if (verifyRes <= 0)
     {
         return raise_OpenSSL_error();