diff --git a/Library/MeterRotator.cpp b/Library/MeterRotator.cpp
index c1097934..83829387 100644
--- a/Library/MeterRotator.cpp
+++ b/Library/MeterRotator.cpp
@@ -39,7 +39,7 @@ MeterRotator::MeterRotator(MeterWindow* meterWindow, const WCHAR* name) : Meter(
 	m_OffsetX(),
 	m_OffsetY(),
 	m_StartAngle(),
-	m_RotationAngle(6.2832),
+	m_RotationAngle(PI * 2.0),
 	m_ValueRemainder(),
 	m_Value()
 {
@@ -97,7 +97,7 @@ void MeterRotator::ReadOptions(ConfigParser& parser, const WCHAR* section)
 	m_OffsetX = parser.ReadFloat(section, L"OffsetX", 0.0);
 	m_OffsetY = parser.ReadFloat(section, L"OffsetY", 0.0);
 	m_StartAngle = parser.ReadFloat(section, L"StartAngle", 0.0);
-	m_RotationAngle = parser.ReadFloat(section, L"RotationAngle", 6.2832);
+	m_RotationAngle = parser.ReadFloat(section, L"RotationAngle", PI * 2.0);
 
 	m_ValueRemainder = parser.ReadInt(section, L"ValueReminder", 0);		// Typo
 	m_ValueRemainder = parser.ReadInt(section, L"ValueRemainder", m_ValueRemainder);