diff --git a/src/devices/sound/multipcm.cpp b/src/devices/sound/multipcm.cpp
index e3f533db186..f53c543cb89 100644
--- a/src/devices/sound/multipcm.cpp
+++ b/src/devices/sound/multipcm.cpp
@@ -259,8 +259,6 @@ void multipcm_device::lfo_init()
 		}
 	}
 
-	m_pitch_scale_tables = std::make_unique<std::unique_ptr<int32_t[]>[]>(8);
-	m_amplitude_scale_tables = std::make_unique<std::unique_ptr<int32_t[]>[]>(8);
 	for (int32_t table = 0; table < 8; ++table)
 	{
 		float limit = PHASE_SCALE_LIMIT[table];
diff --git a/src/devices/sound/multipcm.h b/src/devices/sound/multipcm.h
index 1072a1846ed..abfa8b7c1b9 100644
--- a/src/devices/sound/multipcm.h
+++ b/src/devices/sound/multipcm.h
@@ -107,9 +107,9 @@ private:
 	std::unique_ptr<int32_t[]> m_total_level_steps;
 
 	std::unique_ptr<int32_t[]> m_pitch_table;
-	std::unique_ptr<std::unique_ptr<int32_t[]>[]> m_pitch_scale_tables;
+	std::unique_ptr<int32_t[]> m_pitch_scale_tables[8];
 	std::unique_ptr<int32_t[]> m_amplitude_table;
-	std::unique_ptr<std::unique_ptr<int32_t[]>[]> m_amplitude_scale_tables;
+	std::unique_ptr<int32_t[]> m_amplitude_scale_tables[8];
 
 	uint32_t value_to_fixed(const uint32_t bits, const float value);