diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c
index 04fd325..ce58ab2 100644
--- a/programs/x509/cert_app.c
+++ b/programs/x509/cert_app.c
@@ -159,6 +159,7 @@
      * Set to sane values
      */
     server_fd = 0;
+    mbedtls_ctr_drbg_init( &ctr_drbg );
     mbedtls_x509_crt_init( &cacert );
     mbedtls_x509_crt_init( &clicert );
 #if defined(MBEDTLS_X509_CRL_PARSE_C)
@@ -365,11 +366,11 @@
         fflush( stdout );
 
         mbedtls_entropy_init( &entropy );
-        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 %d\n", ret );
+            mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret );
             goto exit;
         }
 
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 3059443..9ea08bd 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -149,6 +149,7 @@
     mbedtls_x509write_csr_init( &req );
     mbedtls_x509write_csr_set_md_alg( &req, MBEDTLS_MD_SHA256 );
     mbedtls_pk_init( &key );
+    mbedtls_ctr_drbg_init( &ctr_drbg );
     memset( buf, 0, sizeof( buf ) );
 
     if( argc == 0 )
@@ -259,11 +260,11 @@
     fflush( stdout );
 
     mbedtls_entropy_init( &entropy );
-    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 %d", ret );
+        mbedtls_printf( " failed\n  !  mbedtls_ctr_drbg_seed returned %d", ret );
         goto exit;
     }
 
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 20ee5b4..8c4e6da 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -211,6 +211,7 @@
     mbedtls_pk_init( &loaded_issuer_key );
     mbedtls_pk_init( &loaded_subject_key );
     mbedtls_mpi_init( &serial );
+    mbedtls_ctr_drbg_init( &ctr_drbg );
 #if defined(MBEDTLS_X509_CSR_PARSE_C)
     mbedtls_x509_csr_init( &csr );
 #endif
@@ -371,12 +372,12 @@
     fflush( stdout );
 
     mbedtls_entropy_init( &entropy );
-    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_strerror( ret, buf, 1024 );
-        mbedtls_printf( " failed\n  !  mbedtls_ctr_drbg_init returned %d - %s\n", ret, buf );
+        mbedtls_printf( " failed\n  !  mbedtls_ctr_drbg_seed returned %d - %s\n", ret, buf );
         goto exit;
     }