diff --git a/kcms/fonts/fonts.h b/kcms/fonts/fonts.h
--- a/kcms/fonts/fonts.h
+++ b/kcms/fonts/fonts.h
@@ -106,7 +106,9 @@
     int m_dpi;
     int m_dpiOriginal;
     int m_subPixelCurrentIndex = 0;
+    int m_subPixelCurrentIndexOriginal;
     int m_hintingCurrentIndex = 0;
+    int m_hintingCurrentIndexOriginal;
     QStandardItemModel *m_subPixelOptionsModel;
     QStandardItemModel *m_hintingOptionsModel;
     bool m_exclude = false;
diff --git a/kcms/fonts/fonts.cpp b/kcms/fonts/fonts.cpp
--- a/kcms/fonts/fonts.cpp
+++ b/kcms/fonts/fonts.cpp
@@ -145,6 +145,7 @@
     xft.getSubPixelType(spType);
 
     setSubPixelCurrentIndex(spType);
+    m_subPixelCurrentIndexOriginal = spType;
 
     KXftConfig::Hint::Style hStyle;
 
@@ -159,6 +160,7 @@
     }
 
     setHintingCurrentIndex(hStyle);
+    m_hintingCurrentIndexOriginal = hStyle;
 
     KConfig _cfgfonts("kcmfonts");
     KConfigGroup cfgfonts(&_cfgfonts, "General");
@@ -291,6 +293,9 @@
 
     m_excludeToOriginal = m_excludeTo;
     m_excludeFromOriginal = m_excludeFrom;
+    
+    m_subPixelCurrentIndexOriginal = m_subPixelCurrentIndex;
+    m_hintingCurrentIndexOriginal = m_hintingCurrentIndex;
 
     return mod;
 }
@@ -415,7 +420,12 @@
 
 bool FontAASettings::needsSave() const
 {
-    return m_excludeTo != m_excludeToOriginal || m_excludeFrom != m_excludeFromOriginal || m_antiAliasing != m_antiAliasingOriginal || m_dpi != m_dpiOriginal;
+    return m_excludeTo != m_excludeToOriginal
+        || m_excludeFrom != m_excludeFromOriginal
+        || m_antiAliasing != m_antiAliasingOriginal
+        || m_dpi != m_dpiOriginal
+        || m_subPixelCurrentIndex != m_subPixelCurrentIndexOriginal
+        || m_hintingCurrentIndex != m_hintingCurrentIndexOriginal;
 }