diff --git a/programs/pkey/ecdsa.c b/programs/pkey/ecdsa.c
index 40d67da..67fc710 100644
--- a/programs/pkey/ecdsa.c
+++ b/programs/pkey/ecdsa.c
@@ -229,6 +229,7 @@
 
     ecdsa_free( &ctx_verify );
     ecdsa_free( &ctx_sign );
+    ctr_drbg_free( &ctr_drbg );
     entropy_free( &entropy );
 
     return( ret );