diff --git a/programs/pkey/pk_sign.c b/programs/pkey/pk_sign.c
index 150b090..be8b513 100644
--- a/programs/pkey/pk_sign.c
+++ b/programs/pkey/pk_sign.c
@@ -81,6 +81,7 @@
     size_t olen = 0;
 
     mbedtls_entropy_init( &entropy );
+    mbedtls_ctr_drbg_init( &ctr_drbg );
     mbedtls_pk_init( &pk );
 
     if( argc != 3 )
@@ -97,11 +98,11 @@
     mbedtls_printf( "\n  . Seeding the random number generator..." );
     fflush( stdout );
 
-    if( ( ret = mbedtls_ctr_drbg_init( &ctr_drbg, mbedtls_entropy_func, &entropy,
+    if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
                                (const unsigned char *) pers,
                                strlen( pers ) ) ) != 0 )
     {
-        mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_init returned -0x%04x\n", -ret );
+        mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned -0x%04x\n", -ret );
         goto exit;
     }