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-rw-r--r--src/emu/validity.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/emu/validity.h b/src/emu/validity.h
index 594e55a6e9f..bdb30b409e4 100644
--- a/src/emu/validity.h
+++ b/src/emu/validity.h
@@ -74,9 +74,9 @@ private:
void validate_rgb();
void validate_driver(device_t &root);
void validate_roms(device_t &root);
- void validate_analog_input_field(ioport_field &field);
- void validate_dip_settings(ioport_field &field);
- void validate_condition(ioport_condition &condition, device_t &device);
+ void validate_analog_input_field(const ioport_field &field);
+ void validate_dip_settings(const ioport_field &field);
+ void validate_condition(const ioport_condition &condition, device_t &device);
void validate_inputs(device_t &root);
void validate_devices(machine_config &config);
void validate_device_types();