Introduced entropy_free()
diff --git a/programs/pkey/rsa_sign_pss.c b/programs/pkey/rsa_sign_pss.c
index 06fc2e0..fecfcc2 100644
--- a/programs/pkey/rsa_sign_pss.c
+++ b/programs/pkey/rsa_sign_pss.c
@@ -156,6 +156,7 @@
 
 exit:
     pk_free( &pk );
+    entropy_free( &entropy );
 
 #if defined(_WIN32)
     printf( "  + Press Enter to exit this program.\n" );