diff --git a/qglview/material_map_editor.ui b/qglview/material_map_editor.ui
index 47227a2..668e97d 100644
--- a/qglview/material_map_editor.ui
+++ b/qglview/material_map_editor.ui
@@ -142,6 +142,9 @@
        </item>
        <item>
         <widget class="QDoubleSpinBox" name="spinScaleX">
+         <property name="maximum">
+          <double>9999.000000000000000</double>
+         </property>
          <property name="singleStep">
           <double>0.100000000000000</double>
          </property>
@@ -181,6 +184,9 @@
        </item>
        <item>
         <widget class="QDoubleSpinBox" name="spinScaleY">
+         <property name="maximum">
+          <double>9999.000000000000000</double>
+         </property>
          <property name="singleStep">
           <double>0.100000000000000</double>
          </property>