diff --git a/src/mame/drivers/cd32.c b/src/mame/drivers/cd32.c
index 246bc229dee..09398821132 100644
--- a/src/mame/drivers/cd32.c
+++ b/src/mame/drivers/cd32.c
@@ -238,7 +238,7 @@ CUSTOM_INPUT_MEMBER(cd32_state::cubo_input)
 CUSTOM_INPUT_MEMBER(cd32_state::cd32_sel_mirror_input)
 {
 	ioport_port* ports[2]= { m_p1_port, m_p2_port };
-	UINT8 bits = ports[(int)param]->read();
+	UINT8 bits = ports[(int)(FPTR)param]->read();
 	return (bits & 0x20)>>5;
 }
 
diff --git a/src/mame/machine/amiga.c b/src/mame/machine/amiga.c
index dc10704a06e..0a27656f4d2 100644
--- a/src/mame/machine/amiga.c
+++ b/src/mame/machine/amiga.c
@@ -413,7 +413,7 @@ CUSTOM_INPUT_MEMBER( amiga_state::amiga_joystick_convert )
 {
 	ioport_port* ports[2] = { m_p1joy_port, m_p2joy_port };
 	UINT8 bits;
-	if (ports[(int)param]) bits = ports[(int)param]->read();
+	if (ports[(int)(FPTR)param]) bits = ports[(int)(FPTR)param]->read();
 	else bits = 0xff;
 
 	int up = (bits >> 0) & 1;