diff --git a/programs/hash/sha1sum.c b/programs/hash/sha1sum.c
index 1e247d8..8dc4e08 100644
--- a/programs/hash/sha1sum.c
+++ b/programs/hash/sha1sum.c
@@ -42,11 +42,8 @@
 #endif
 
 #if !defined(POLARSSL_SHA1_C) || !defined(POLARSSL_FS_IO)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_SHA1_C and/or POLARSSL_FS_IO not defined.\n");
     return( 0 );
 }