diff --git a/src/plugins/texteditor/generalsettingspage.ui b/src/plugins/texteditor/generalsettingspage.ui
index 11f6b8b997e..140f94628d6 100644
--- a/src/plugins/texteditor/generalsettingspage.ui
+++ b/src/plugins/texteditor/generalsettingspage.ui
@@ -66,6 +66,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="minimum">
+           <number>1</number>
+          </property>
           <property name="maximum">
            <number>20</number>
           </property>
@@ -132,6 +135,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="minimum">
+           <number>1</number>
+          </property>
           <property name="maximum">
            <number>20</number>
           </property>