diff --git a/eeschema/dialogs/dialog_fields_editor_global.cpp b/eeschema/dialogs/dialog_fields_editor_global.cpp
index 1d1ad872b5..d6445f3a6e 100644
--- a/eeschema/dialogs/dialog_fields_editor_global.cpp
+++ b/eeschema/dialogs/dialog_fields_editor_global.cpp
@@ -472,7 +472,7 @@ public:
 
     void ExpandAfterSort()
     {
-        for( int i = 0; i < m_rows.size(); ++i )
+        for( size_t i = 0; i < m_rows.size(); ++i )
         {
             if( m_rows[ i ].m_Flag == GROUP_COLLAPSED_DURING_SORT )
                 ExpandRow( i );