diff --git a/variants/OPTA/pins_arduino.h b/variants/OPTA/pins_arduino.h
index 301ac30aa..107190dc8 100644
--- a/variants/OPTA/pins_arduino.h
+++ b/variants/OPTA/pins_arduino.h
@@ -68,6 +68,16 @@ static const uint8_t A6 = PIN_A6;
static const uint8_t A7 = PIN_A7;
#define ADC_RESOLUTION 12
+// Pin mapping to match serigraphy
+static const uint8_t I1 = PIN_A0;
+static const uint8_t I2 = PIN_A1;
+static const uint8_t I3 = PIN_A2;
+static const uint8_t I4 = PIN_A3;
+static const uint8_t I5 = PIN_A4;
+static const uint8_t I6 = PIN_A5;
+static const uint8_t I7 = PIN_A6;
+static const uint8_t I8 = PIN_A7;
+
// Digital pins
// -----------
#define D0 (0u)
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