diff --git a/data/themes/cusis/style.css b/data/themes/cusis/style.css
index b37f57403..05979a67d 100644
--- a/data/themes/cusis/style.css
+++ b/data/themes/cusis/style.css
@@ -181,6 +181,10 @@ timeLine {
 	font-size: 8px;
 }
 
+QTreeView {
+	alternate-background-color: rgb(108,108,108);
+}
+
 /* Plugins */
 
 TripleOscillatorView knob {
diff --git a/data/themes/default/style.css b/data/themes/default/style.css
index 731a80164..c05c52dd0 100644
--- a/data/themes/default/style.css
+++ b/data/themes/default/style.css
@@ -185,6 +185,10 @@ timeLine {
 	font-size: 8px;
 }
 
+QTreeView {
+	alternate-background-color: rgb(108,108,108);
+}
+
 /* Plugins */
 
 TripleOscillatorView knob {