diff --git a/common/tool/selection.cpp b/common/tool/selection.cpp
index e25aacf76e..f0f67c1d83 100644
--- a/common/tool/selection.cpp
+++ b/common/tool/selection.cpp
@@ -95,7 +95,7 @@ VECTOR2I SELECTION::GetCenter() const
         for( EDA_ITEM* item : m_items )
             center += item->GetPosition();
 
-        center = center / m_items.size();
+        center = center / static_cast<unsigned>( m_items.size() );
         return static_cast<VECTOR2I>( center );
     }