diff --git a/docs/FreeBedsChartView.js b/docs/FreeBedsChartView.js
index 129490b5e97..64ebec72e18 100644
--- a/docs/FreeBedsChartView.js
+++ b/docs/FreeBedsChartView.js
@@ -86,7 +86,7 @@ class FreeBedsChartView {
                 },
                 tooltip: {
                     callbacks: {
-                        label: UIUtils.getLabelWithPercent
+                        label: UIUtils.getYLabelWithPercent
                     }
                 }
             },
diff --git a/docs/MedianOfFreeBedsByKreisChartView.js b/docs/MedianOfFreeBedsByKreisChartView.js
index 473eece2e69..66976a41158 100644
--- a/docs/MedianOfFreeBedsByKreisChartView.js
+++ b/docs/MedianOfFreeBedsByKreisChartView.js
@@ -51,7 +51,7 @@ class MedianOfFreeBedsByKreisChartView {
                 },
                 tooltip: {
                     callbacks: {
-                        label: UIUtils.getLabelWithPercent
+                        label: UIUtils.getXLabelWithPercent
                     }
                 }
             },
diff --git a/docs/UIUtils.js b/docs/UIUtils.js
index d637fc26124..dde6f8514a2 100644
--- a/docs/UIUtils.js
+++ b/docs/UIUtils.js
@@ -17,14 +17,22 @@ class UIUtils {
         return selectElement.options[selectElement.selectedIndex];
     }
 
-    static getLabelWithPercent(context) {
+    static getYLabelWithPercent(context) {
+        return UIUtils._getLabelWithPercent(context, context.parsed.y);
+    }
+
+    static getXLabelWithPercent(context) {
+        return UIUtils._getLabelWithPercent(context, context.parsed.x);
+    }
+
+    static _getLabelWithPercent(context, value) {
         let label = context.dataset.label || '';
 
         if (label) {
             label += ': ';
         }
-        if (context.parsed.y !== null) {
-            label += context.parsed.y.toFixed(1) + "%";
+        if (value !== null) {
+            label += value.toFixed(1) + "%";
         }
         return label;
     }