diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index f1d286c..47c02a6 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1991,6 +1991,10 @@
     else
         role = MBEDTLS_ECJPAKE_CLIENT;
 
+    /* Empty password is not valid  */
+    if( ( pw == NULL) || ( pw_len == 0 ) )
+        return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+
     return( mbedtls_ecjpake_setup( &ssl->handshake->ecjpake_ctx,
                                    role,
                                    MBEDTLS_MD_SHA256,