diff --git a/reactos/dll/3rdparty/mbedtls/mbedtls.spec b/reactos/dll/3rdparty/mbedtls/mbedtls.spec
index 26fc7cbcec8..d9fd26530b0 100644
--- a/reactos/dll/3rdparty/mbedtls/mbedtls.spec
+++ b/reactos/dll/3rdparty/mbedtls/mbedtls.spec
@@ -23,6 +23,7 @@
 @ cdecl mbedtls_ssl_write(ptr ptr ptr)
 @ cdecl mbedtls_ssl_get_peer_cert(ptr)
 @ cdecl mbedtls_ssl_config_init(ptr)
+@ cdecl mbedtls_ssl_config_free(ptr)
 @ cdecl mbedtls_ssl_config_defaults(ptr long long long)
 @ cdecl mbedtls_ssl_conf_dbg(ptr ptr ptr)
 @ cdecl mbedtls_ssl_setup(ptr ptr)
diff --git a/reactos/dll/win32/schannel/schannel_mbedtls.c b/reactos/dll/win32/schannel/schannel_mbedtls.c
index a90ee67ee22..90f0c79912e 100644
--- a/reactos/dll/win32/schannel/schannel_mbedtls.c
+++ b/reactos/dll/win32/schannel/schannel_mbedtls.c
@@ -244,6 +244,7 @@ void schan_imp_dispose_session(schan_imp_session session)
     mbedtls_ssl_free(&s->ssl);
     mbedtls_ctr_drbg_free(&s->ctr_drbg);
     mbedtls_entropy_free(&s->entropy);
+    mbedtls_ssl_config_free(&s->conf);
 
     /* safely overwrite the freed context with zeroes */
     HeapFree(GetProcessHeap(), HEAP_ZERO_MEMORY, s);