--- src/TrackArtist.cpp
+++ src/TrackArtist.cpp
@@ -374,7 +374,7 @@
       dc->SetBrush(blackKeyBrush);
 
       int fontSize = 10;
-#ifdef __WXMSW__
+#if defined(__WXMSW__) || defined(__WXGTK__) || defined(__WXGTK20__)
       fontSize = 8;
 #endif
 
--- src/TrackPanel.cpp
+++ src/TrackPanel.cpp
@@ -266,7 +266,7 @@
 void SetLabelFont(wxDC * dc)
 {
    int fontSize = 10;
-#if defined __WXMSW__ || __WXGTK__
+#if defined(__WXMSW__) || defined(__WXGTK__) || defined(__WXGTK20__)
    fontSize = 8;
 #endif
 
--- src/widgets/ASlider.cpp
+++ src/widgets/ASlider.cpp
@@ -42,7 +42,7 @@
 
 #include <iostream>
 
-#if defined __WXMSW__
+#if defined __WXMSW__ || defined(__WXGTK__) || defined(__WXGTK20__)
 const int sliderFontSize = 10;
 #else
 const int sliderFontSize = 12;
--- src/widgets/Ruler.cpp
+++ src/widgets/Ruler.cpp
@@ -42,7 +42,7 @@
    // often.
 
    int fontSize = 10;
-#ifdef __WXMSW__
+#if defined(__WXMSW__) || defined(__WXGTK__) || defined(__WXGTK20__)
    fontSize = 8;
 #endif