diff --git a/programs/pkey/mpi_demo.c b/programs/pkey/mpi_demo.c
index a6d1198..3b7c085 100644
--- a/programs/pkey/mpi_demo.c
+++ b/programs/pkey/mpi_demo.c
@@ -40,22 +40,16 @@
 #endif
 
 #if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_FS_IO)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_FS_IO not defined.\n");
     return( 0 );
 }
 #else
-int main( int argc, char *argv[] )
+int main( void )
 {
     mpi E, P, Q, N, H, D, X, Y, Z;
 
-    ((void) argc);
-    ((void) argv);
-
     mpi_init( &E ); mpi_init( &P ); mpi_init( &Q ); mpi_init( &N );
     mpi_init( &H ); mpi_init( &D ); mpi_init( &X ); mpi_init( &Y );
     mpi_init( &Z );