diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index d868e49..dd34651 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -3944,6 +3944,9 @@
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
+    mbedtls_mpi_free( &conf->dhm_P );
+    mbedtls_mpi_free( &conf->dhm_G );
+
     if( ( ret = mbedtls_mpi_read_binary( &conf->dhm_P, dhm_P, P_len ) ) != 0 ||
         ( ret = mbedtls_mpi_read_binary( &conf->dhm_G, dhm_G, G_len ) ) != 0 )
     {
@@ -3959,6 +3962,9 @@
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
+    mbedtls_mpi_free( &conf->dhm_P );
+    mbedtls_mpi_free( &conf->dhm_G );
+
     if( ( ret = mbedtls_dhm_get_value( dhm_ctx, MBEDTLS_DHM_PARAM_P,
                                        &conf->dhm_P ) ) != 0 ||
         ( ret = mbedtls_dhm_get_value( dhm_ctx, MBEDTLS_DHM_PARAM_G,