diff --git a/programs/ssl/ssl_client1.c b/programs/ssl/ssl_client1.c
index 9922a7e..1ab2e10 100644
--- a/programs/ssl/ssl_client1.c
+++ b/programs/ssl/ssl_client1.c
@@ -99,6 +99,19 @@
 }
 #endif /* MBEDTLS_SSL_CONF_RNG */
 
+#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
+int mbedtls_hardware_poll( void *data, unsigned char *output,
+                           size_t len, size_t *olen )
+{
+    size_t i;
+    (void) data;
+    for( i = 0; i < len; ++i )
+        output[i] = rand();
+    *olen = len;
+    return( 0 );
+}
+#endif
+
 int main( void )
 {
     int ret = 1, len;