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-rw-r--r--src/emu/inptport.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/emu/inptport.c b/src/emu/inptport.c
index 53912701202..93d4fd585a5 100644
--- a/src/emu/inptport.c
+++ b/src/emu/inptport.c
@@ -1854,9 +1854,9 @@ static analog_field_state *init_field_analog_state(const input_field_config *fie
/* set each position to be 512 units */
case IPT_POSITIONAL:
case IPT_POSITIONAL_V:
- state->positionalscale = COMPUTE_SCALE(state->adjmax, INPUT_ABSOLUTE_MAX - INPUT_ABSOLUTE_MIN);
+ state->positionalscale = COMPUTE_SCALE(field->max, INPUT_ABSOLUTE_MAX - INPUT_ABSOLUTE_MIN);
state->adjmin = 0;
- state->adjmax--;
+ state->adjmax = field->max - 1;
state->wraps = ((field->flags & ANALOG_FLAG_WRAPS) != 0);
state->autocenter = !state->wraps;
break;