diff --git a/src/util/capacity.cpp b/src/util/capacity.cpp
index d32b928..c0afa99 100644
--- a/src/util/capacity.cpp
+++ b/src/util/capacity.cpp
@@ -25,8 +25,6 @@
 
 #include <QDebug>
 
-#include <config.h>
-
 const QString Capacity::m_InvalidString = QStringLiteral("---");
 
 /** Creates a new Capacity instance.
@@ -138,11 +136,6 @@ bool Capacity::isValid() const
 	return m_Size >= 0;
 }
 
-Capacity::Unit Capacity::preferredUnit()
-{
-	return static_cast<Unit>(Config::preferredUnit());
-}
-
 QString Capacity::formatByteSize(double size, int precision)
 {
 	if (size < 0)
diff --git a/src/util/capacity.h b/src/util/capacity.h
index 4274dc7..1481830 100644
--- a/src/util/capacity.h
+++ b/src/util/capacity.h
@@ -65,7 +65,6 @@ class LIBKPMCORE_EXPORT Capacity
 		static const QString& invalidString() { return m_InvalidString; } /**< @return string representing an invalid capacity */
 		static QString unitName(Unit u, qint64 val = 1);
 		static qint64 unitFactor(Unit from, Unit to);
-		static Unit preferredUnit();
 
 	private:
 		qint64 m_Size;