diff --git a/programs/pkey/pk_sign.c b/programs/pkey/pk_sign.c
index 451e3de..422fa25 100644
--- a/programs/pkey/pk_sign.c
+++ b/programs/pkey/pk_sign.c
@@ -101,7 +101,8 @@
     mbedtls_printf( "\n  . Reading private key from '%s'", argv[1] );
     fflush( stdout );
 
-    if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
+    if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "",
+                    mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
     {
         mbedtls_printf( " failed\n  ! Could not parse '%s'\n", argv[1] );
         goto exit;