diff --git a/c/src/libchip/network/dec21140.c b/c/src/libchip/network/dec21140.c
index 48ebde43fb..68affba9ef 100644
--- a/c/src/libchip/network/dec21140.c
+++ b/c/src/libchip/network/dec21140.c
@@ -375,7 +375,7 @@ dec21140Enet_interrupt_handler ( struct dec21140_softc *sc )
 }
 
 static rtems_isr
-dec21140Enet_interrupt_handler_entry()
+dec21140Enet_interrupt_handler_entry(void)
 {
    int i;