diff --git a/src/Base/QuantityPyImp.cpp b/src/Base/QuantityPyImp.cpp
index 508d566e58..7ddef4089a 100644
--- a/src/Base/QuantityPyImp.cpp
+++ b/src/Base/QuantityPyImp.cpp
@@ -36,6 +36,8 @@ using namespace Base;
 std::string QuantityPy::representation(void) const
 {
     std::stringstream ret;
+    ret.precision(getQuantityPtr()->getFormat().precision);
+    ret.setf(std::ios::fixed, std::ios::floatfield);
     ret << getQuantityPtr()->getValue() << " "; 
     ret << getQuantityPtr()->getUnit().getString().toUtf8().constData();