Introduced entropy_free()
diff --git a/programs/pkey/ecdsa.c b/programs/pkey/ecdsa.c
index efe6716..add74c6 100644
--- a/programs/pkey/ecdsa.c
+++ b/programs/pkey/ecdsa.c
@@ -179,6 +179,7 @@
 
     ecdsa_free( &ctx_verify );
     ecdsa_free( &ctx_sign );
+    entropy_free( &entropy );
 
     return( ret );
 }