diff --git a/client/gui-qt/citydlg.cpp b/client/gui-qt/citydlg.cpp
index 47339160fc..7147eac013 100644
--- a/client/gui-qt/citydlg.cpp
+++ b/client/gui-qt/citydlg.cpp
@@ -65,6 +65,7 @@
 #include "citydlg.h"
 #include "colors.h"
 #include "fc_client.h"
+#include "gui_main.h"
 #include "hudwidget.h"
 
 extern QApplication *qapp;
@@ -85,6 +86,7 @@ progress_bar::progress_bar(QWidget *parent): QProgressBar(parent)
   startTimer(50);
   create_region();
   sfont = new QFont;
+  log_qtfont(sfont, "Drawing font for progress bar");
   m_animate_step = 0;
   pix = nullptr;
 }
@@ -255,6 +257,7 @@ void progress_bar::paintEvent(QPaintEvent *event)
   p.setPen(c);
   sfont->setCapitalization(QFont::AllUppercase);
   sfont->setBold(true);
+  log_qtfont(sfont, "Progress bar painter")
   p.setFont(*sfont);
 
   if (text().contains('\n')) {
@@ -271,6 +274,8 @@ void progress_bar::paintEvent(QPaintEvent *event)
       } else  {
         sfont->setPointSize(height() / 4);
       }
+
+      log_qtfont(sfont, "Painter adjusted")
     }
 
     j = height() - 2 * f_size;
@@ -3258,6 +3263,9 @@ void city_dialog::update_building()
   str = QString(buf);
   str = str.simplified();
 
+  QFont tmp = production_combo_p->font();
+  log_qtfont(&tmp, "Production combo itself");
+  log_qtfont(production_combo_p->sfont, "Production combo uses");
   production_combo_p->setFormat(QString("(%p%) %2\n%1")
                                 .arg(city_production_name_translation(pcity),
                                      str));
diff --git a/client/gui-qt/citydlg.h b/client/gui-qt/citydlg.h
index 70095de441..c93fbbd845 100644
--- a/client/gui-qt/citydlg.h
+++ b/client/gui-qt/citydlg.h
@@ -122,6 +122,7 @@ public:
   void set_pixmap(struct universal *target);
   void set_pixmap(int n);
 
+  QFont *sfont;
 protected:
   void paintEvent(QPaintEvent *event);
   void timerEvent(QTimerEvent *event);
@@ -131,7 +132,6 @@ private:
   int m_animate_step;
   QPixmap *pix;
   QRegion reg;
-  QFont *sfont;
 };
 
 /****************************************************************************
diff --git a/client/gui-qt/gui_main.cpp b/client/gui-qt/gui_main.cpp
index c150a363ef..8cc2c2a668 100644
--- a/client/gui-qt/gui_main.cpp
+++ b/client/gui-qt/gui_main.cpp
@@ -199,6 +199,9 @@ void qtg_ui_main(int argc, char *argv[])
       }
     } options_iterate_end;
 
+    QFont tmp = QApplication::font();
+    log_qtfont(&tmp, "App default after change callbacks");
+
     freeciv_qt->fc_main(qapp);
   }
 }
@@ -416,6 +419,7 @@ static void apply_font(struct option *poption)
     remove_old = fc_font::instance()->get_font(s);
     delete remove_old;
     fc_font::instance()->set_font(s, f);
+    log_qtfont(f, s.toUtf8().data());
     update_city_descriptions();
     gui()->infotab->chtwdg->update_font();
     QApplication::setFont(*fc_font::instance()->get_font(fonts::default_font));
diff --git a/client/gui-qt/gui_main.h b/client/gui-qt/gui_main.h
index fe721e545a..7aec87723c 100644
--- a/client/gui-qt/gui_main.h
+++ b/client/gui-qt/gui_main.h
@@ -17,4 +17,7 @@
 void popup_quit_dialog();
 QApplication *current_app();
 
+#define log_qtfont(__font__, __msg__) log_normal("%s : %s.", (__msg__), \
+                  (__font__)->toString().toUtf8().data())
+
 #endif /* FC__GUI_MAIN_H */