diff --git a/client/gui/implementations/GuiCellWorkbench.java b/client/gui/implementations/GuiCellWorkbench.java
index d27121870..823e6ae9d 100644
--- a/client/gui/implementations/GuiCellWorkbench.java
+++ b/client/gui/implementations/GuiCellWorkbench.java
@@ -56,7 +56,7 @@ public class GuiCellWorkbench extends GuiUpgradeable
 	@Override
 	public void drawBG(int offsetX, int offsetY, int mouseX, int mouseY)
 	{
-		handleButtonVisiblity();
+		handleButtonVisibility();
 
 		bindTexture( getBackground() );
 		this.drawTexturedModalRect( offsetX, offsetY, 0, 0, 211 - 34, ySize );
@@ -148,7 +148,7 @@ public class GuiCellWorkbench extends GuiUpgradeable
 		buttonList.add( copyMode );
 	}
 
-	protected void handleButtonVisiblity()
+	protected void handleButtonVisibility()
 	{
 		copyMode.setState( ccwb.copyMode == CopyMode.CLEAR_ON_REMOVE );
 
diff --git a/client/gui/implementations/GuiLevelEmitter.java b/client/gui/implementations/GuiLevelEmitter.java
index ff91a1f8e..912345100 100644
--- a/client/gui/implementations/GuiLevelEmitter.java
+++ b/client/gui/implementations/GuiLevelEmitter.java
@@ -148,7 +148,7 @@ public class GuiLevelEmitter extends GuiUpgradeable
 		}
 	}
 
-	protected void handleButtonVisiblity()
+	protected void handleButtonVisibility()
 	{
 		craftingMode.setVisibility( bc.getInstalledUpgrades( Upgrades.CRAFTING ) > 0 );
 		fuzzyMode.setVisibility( bc.getInstalledUpgrades( Upgrades.FUZZY ) > 0 );
diff --git a/client/gui/implementations/GuiUpgradeable.java b/client/gui/implementations/GuiUpgradeable.java
index e0edfb615..0ed3cf016 100644
--- a/client/gui/implementations/GuiUpgradeable.java
+++ b/client/gui/implementations/GuiUpgradeable.java
@@ -96,7 +96,7 @@ public class GuiUpgradeable extends AEBaseGui
 	@Override
 	public void drawBG(int offsetX, int offsetY, int mouseX, int mouseY)
 	{
-		handleButtonVisiblity();
+		handleButtonVisibility();
 
 		bindTexture( getBackground() );
 		this.drawTexturedModalRect( offsetX, offsetY, 0, 0, 211 - 34, ySize );
@@ -116,7 +116,7 @@ public class GuiUpgradeable extends AEBaseGui
 		return "guis/bus.png";
 	}
 
-	protected void handleButtonVisiblity()
+	protected void handleButtonVisibility()
 	{
 		if ( redstoneMode != null )
 			redstoneMode.setVisibility( bc.getInstalledUpgrades( Upgrades.REDSTONE ) > 0 );