diff --git a/src/libopensc/pkcs15-dnie.c b/src/libopensc/pkcs15-dnie.c
index 57f1f389..1a98260d 100644
--- a/src/libopensc/pkcs15-dnie.c
+++ b/src/libopensc/pkcs15-dnie.c
@@ -239,7 +239,7 @@ static int sc_pkcs15emu_dnie_init(sc_pkcs15_card_t * p15card)
 /* Public Functions When called as DLL Module*/
 /********************************************/
 
-const char *sc_driver_version()
+const char *sc_driver_version(void)
 {
 	return "0.12.3-svn";	/* defined in config.h of OpenSC */
 }