diff --git a/src/kfontchooser.cpp b/src/kfontchooser.cpp
--- a/src/kfontchooser.cpp
+++ b/src/kfontchooser.cpp
@@ -110,6 +110,8 @@
 
     KFontChooser *q;
 
+    QFontDatabase fdb;
+
     QPalette m_palette;
 
     QDoubleSpinBox *sizeOfFont = nullptr;
@@ -554,8 +556,7 @@
     }
 
     // Get the list of styles available in this family.
-    QFontDatabase dbase;
-    QStringList styles = dbase.styles(currentFamily);
+    QStringList styles = fdb.styles(currentFamily);
     if (styles.isEmpty()) {
         // Avoid extraction, it is in kdeqt.po
         styles.append(TR_NOX("Normal", "QFontDatabase"));
@@ -573,8 +574,8 @@
         // Sometimes the font database will report an invalid style,
         // that falls back back to another when set.
         // Remove such styles, by checking set/get round-trip.
-        QFont testFont = dbase.font(currentFamily, style, 10);
-        if (dbase.styleString(testFont) != style) {
+        QFont testFont = fdb.font(currentFamily, style, 10);
+        if (fdb.styleString(testFont) != style) {
             styles.removeAll(style);
             continue;
         }
@@ -616,8 +617,8 @@
     qreal currentSize = setupSizeListBox(currentFamily, currentStyle);
     sizeOfFont->setValue(currentSize);
 
-    selFont = dbase.font(currentFamily, currentStyle, int(currentSize));
-    if (dbase.isSmoothlyScalable(currentFamily, currentStyle) && selFont.pointSize() == floor(currentSize)) {
+    selFont = fdb.font(currentFamily, currentStyle, int(currentSize));
+    if (fdb.isSmoothlyScalable(currentFamily, currentStyle) && selFont.pointSize() == floor(currentSize)) {
         selFont.setPointSizeF(currentSize);
     }
     emit q->fontSelected(selFont);
@@ -632,7 +633,6 @@
     }
     signalsAllowed = false;
 
-    QFontDatabase dbase;
     QString currentFamily = qtFamilies[familyListBox->currentItem()->text()];
     QString currentStyle;
     if (style.isEmpty()) {
@@ -645,8 +645,8 @@
     qreal currentSize = setupSizeListBox(currentFamily, currentStyle);
     sizeOfFont->setValue(currentSize);
 
-    selFont = dbase.font(currentFamily, currentStyle, int(currentSize));
-    if (dbase.isSmoothlyScalable(currentFamily, currentStyle) && selFont.pointSize() == floor(currentSize)) {
+    selFont = fdb.font(currentFamily, currentStyle, int(currentSize));
+    if (fdb.isSmoothlyScalable(currentFamily, currentStyle) && selFont.pointSize() == floor(currentSize)) {
         selFont.setPointSizeF(currentSize);
     }
     emit q->fontSelected(selFont);
@@ -700,7 +700,6 @@
     // We compare with qreal, so convert for platforms where qreal != double.
     qreal val = qreal(dval);
 
-    QFontDatabase dbase;
     QString family = qtFamilies[familyListBox->currentItem()->text()];
     QString style = qtStyles[styleListBox->currentItem()->text()];
 
@@ -713,7 +712,7 @@
     bool canCustomize = true;
 
     // For Qt-bad-sizes workaround: skip this block unconditionally
-    if (!dbase.isSmoothlyScalable(family, style)) {
+    if (!fdb.isSmoothlyScalable(family, style)) {
         // Bitmap font, allow only discrete sizes.
         // Determine the nearest in the direction of change.
         canCustomize = false;
@@ -825,11 +824,10 @@
 
 qreal KFontChooser::Private::setupSizeListBox(const QString &family, const QString &style)
 {
-    QFontDatabase dbase;
     QList<qreal> sizes;
-    const bool smoothlyScalable = dbase.isSmoothlyScalable(family, style);
+    const bool smoothlyScalable = fdb.isSmoothlyScalable(family, style);
     if (!smoothlyScalable) {
-        const QList<int> smoothSizes = dbase.smoothSizes(family, style);
+        const QList<int> smoothSizes = fdb.smoothSizes(family, style);
         for (int size : smoothSizes) {
             sizes.append(size);
         }
@@ -851,7 +849,6 @@
 
 void KFontChooser::Private::setupDisplay()
 {
-    QFontDatabase dbase;
     QString family = selFont.family().toLower();
     QString styleID = styleIdentifier(selFont);
     qreal size = selFont.pointSizeF();
@@ -932,7 +929,7 @@
     // otherwise just select the nearest available size.
     QString currentFamily = qtFamilies[familyListBox->currentItem()->text()];
     QString currentStyle = qtStyles[styleListBox->currentItem()->text()];
-    bool canCustomize = dbase.isSmoothlyScalable(currentFamily, currentStyle);
+    bool canCustomize = fdb.isSmoothlyScalable(currentFamily, currentStyle);
     sizeListBox->setCurrentRow(nearestSizeRow(size, canCustomize));
 
     // Set current size in the spinbox.