diff --git a/app/src/processing/app/contrib/ContributionTab.java b/app/src/processing/app/contrib/ContributionTab.java
index 46238e377..7d3b76dd3 100644
--- a/app/src/processing/app/contrib/ContributionTab.java
+++ b/app/src/processing/app/contrib/ContributionTab.java
@@ -541,7 +541,7 @@ public class ContributionTab extends JPanel {
       if (categoryChooser.getUI() instanceof PdeComboBoxUI) {
         ((PdeComboBoxUI) categoryChooser.getUI()).updateTheme();
       } else {
-        categoryChooser.setUI(new PdeComboBoxUI("manager"));
+        categoryChooser.setUI(new PdeComboBoxUI("manager.categories"));
       }
 
       /*
diff --git a/app/src/processing/app/laf/PdeComboBoxUI.java b/app/src/processing/app/laf/PdeComboBoxUI.java
index 3b5289ddd..7cbfa48ac 100644
--- a/app/src/processing/app/laf/PdeComboBoxUI.java
+++ b/app/src/processing/app/laf/PdeComboBoxUI.java
@@ -130,12 +130,12 @@ public class PdeComboBoxUI extends BasicComboBoxUI {
 
 
   public void updateTheme() {
-    enabledFgColor = Theme.getColor(prefix + ".combo_box.enabled.fgcolor");
-    enabledBgColor = Theme.getColor(prefix + ".combo_box.enabled.bgcolor");
-    disabledFgColor = Theme.getColor(prefix + ".combo_box.disabled.fgcolor");
-    disabledBgColor = Theme.getColor(prefix + ".combo_box.disabled.bgcolor");
-    selectedFgColor = Theme.getColor(prefix + ".combo_box.selected.fgcolor");
-    selectedFgColor = Theme.getColor(prefix + ".combo_box.selected.fgcolor");
+    enabledFgColor = Theme.getColor(prefix + ".enabled.fgcolor");
+    enabledBgColor = Theme.getColor(prefix + ".enabled.bgcolor");
+    disabledFgColor = Theme.getColor(prefix + ".disabled.fgcolor");
+    disabledBgColor = Theme.getColor(prefix + ".disabled.bgcolor");
+    selectedFgColor = Theme.getColor(prefix + ".selected.fgcolor");
+    selectedFgColor = Theme.getColor(prefix + ".selected.fgcolor");
 
     if (arrowButton.isEnabled()) {
       arrowButton.setBackground(enabledBgColor);
diff --git a/build/shared/lib/theme.txt b/build/shared/lib/theme.txt
index 7109c11d2..afed56170 100644
--- a/build/shared/lib/theme.txt
+++ b/build/shared/lib/theme.txt
@@ -209,12 +209,12 @@ manager.tab.background = #6BA0C7
 ## ContributionTab
 
 # category chooser for libraries
-manager.combo_box.enabled.fgcolor = #00FF00
-manager.combo_box.enabled.bgcolor = #000000
-manager.combo_box.disabled.fgcolor = #444444
-manager.combo_box.disabled.bgcolor = #666666
-manager.combo_box.selected.fgcolor = #FF8000
-manager.combo_box.selected.bgcolor = #0080FF
+manager.categories.enabled.fgcolor = #00FF00
+manager.categories.enabled.bgcolor = #000000
+manager.categories.disabled.fgcolor = #444444
+manager.categories.disabled.bgcolor = #666666
+manager.categories.selected.fgcolor = #FF8000
+manager.categories.selected.bgcolor = #0080FF
 
 
 # error window (X) close button