diff --git a/src/Base/UnitsApi.cpp b/src/Base/UnitsApi.cpp
index 82bfb6fd24..0d830c19b5 100644
--- a/src/Base/UnitsApi.cpp
+++ b/src/Base/UnitsApi.cpp
@@ -133,7 +133,7 @@ void UnitsApi::setSchema(UnitSystem s)
 
 QString UnitsApi::toString(const Base::Quantity& q, const QuantityFormat& f)
 {
-    QString value = QString::fromLatin1("'%1 %2'").arg(q.getValue(), 0, f.toFormat(), f.precision+2)
+    QString value = QString::fromLatin1("'%1 %2'").arg(q.getValue(), 0, f.toFormat(), f.precision+1)
                                                   .arg(q.getUnit().getString());
     return value;
 }