diff --git a/src/App/Expression.cpp b/src/App/Expression.cpp
index d6291040a..69e888d96 100644
--- a/src/App/Expression.cpp
+++ b/src/App/Expression.cpp
@@ -258,7 +258,7 @@ void NumberExpression::negate()
 std::string NumberExpression::toString() const
 {
     std::stringstream s;
-    s << quantity.getValue();
+    s << std::setprecision(std::numeric_limits<double>::digits10 + 1) << quantity.getValue();
 
     /* Trim of any extra spaces */
     //while (s.size() > 0 && s[s.size() - 1] == ' ')