diff --git a/src/main/java/appeng/client/gui/widgets/SettingToggleButton.java b/src/main/java/appeng/client/gui/widgets/SettingToggleButton.java
index 50ddad377..e5a532cd4 100644
--- a/src/main/java/appeng/client/gui/widgets/SettingToggleButton.java
+++ b/src/main/java/appeng/client/gui/widgets/SettingToggleButton.java
@@ -314,7 +314,7 @@ public class SettingToggleButton<T extends Enum<T>> extends IconButton {
 
             return name + '\n' + sb;
         }
-        return null;
+        return "";
     }
 
     public String getFillVar() {
diff --git a/src/main/java/appeng/client/gui/widgets/ToggleButton.java b/src/main/java/appeng/client/gui/widgets/ToggleButton.java
index 8d2f63560..5a13843b5 100644
--- a/src/main/java/appeng/client/gui/widgets/ToggleButton.java
+++ b/src/main/java/appeng/client/gui/widgets/ToggleButton.java
@@ -99,7 +99,7 @@ public class ToggleButton extends Button implements ITooltip {
 
             return name + '\n' + sb;
         }
-        return null;
+        return "";
     }
 
     @Override
diff --git a/src/main/java/appeng/fluids/client/gui/widgets/FluidTankWidget.java b/src/main/java/appeng/fluids/client/gui/widgets/FluidTankWidget.java
index 80a97b4d1..3fc8a098d 100644
--- a/src/main/java/appeng/fluids/client/gui/widgets/FluidTankWidget.java
+++ b/src/main/java/appeng/fluids/client/gui/widgets/FluidTankWidget.java
@@ -93,7 +93,7 @@ public class FluidTankWidget extends Widget implements ITooltip {
 
             return desc + "\n" + amountToText;
         }
-        return null;
+        return "";
     }
 
     @Override