diff --git a/programs/pkey/pk_encrypt.c b/programs/pkey/pk_encrypt.c
index bfef31c..4e71be1 100644
--- a/programs/pkey/pk_encrypt.c
+++ b/programs/pkey/pk_encrypt.c
@@ -70,6 +70,7 @@
     const char *pers = "mbedtls_pk_encrypt";
 
     ret = 1;
+    mbedtls_ctr_drbg_init( &ctr_drbg );
 
     if( argc != 3 )
     {
@@ -86,11 +87,11 @@
     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 -0x%04x\n", -ret );
+        mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned -0x%04x\n", -ret );
         goto exit;
     }