diff --git a/Library/Rainmeter.cpp b/Library/Rainmeter.cpp
index d2979a7d..37fe23bc 100644
--- a/Library/Rainmeter.cpp
+++ b/Library/Rainmeter.cpp
@@ -1547,7 +1547,8 @@ void RainmeterWriteKeyValueWide(const WCHAR* arg)
 					if (formula != -1)
 					{
 						WCHAR buffer[256];
-						_snwprintf_s(buffer, _TRUNCATE, L"%f", value);
+						int len = _snwprintf_s(buffer, _TRUNCATE, L"%.5f", value);
+						CMeasure::RemoveTrailingZero(buffer, len);
 
 						const std::wstring& resultString = buffer;