diff --git a/src/mame/drivers/pasha2.cpp b/src/mame/drivers/pasha2.cpp
index 100ea4873a4..370b53e962f 100644
--- a/src/mame/drivers/pasha2.cpp
+++ b/src/mame/drivers/pasha2.cpp
@@ -213,9 +213,9 @@ WRITE16_MEMBER(pasha2_state::pasha2_lamps_w)
 {
 	for (int p = 0; p < 3; p++)
 	{
-		m_lamps_r[i] = BIT(data, 4 * p);
-		m_lamps_g[i] = BIT(data, 4 * p + 1);
-		m_lamps_b[i] = BIT(data, 4 * p + 2);
+		m_lamps_r[p] = BIT(data, (p << 2) | 0);
+		m_lamps_g[p] = BIT(data, (p << 2) | 1);
+		m_lamps_b[p] = BIT(data, (p << 2) | 2);
 	}
 }