diff --git a/src/main/java/dan200/computercraft/shared/computer/blocks/TileComputerBase.java b/src/main/java/dan200/computercraft/shared/computer/blocks/TileComputerBase.java
index 4bf12897b..8e3c999e0 100644
--- a/src/main/java/dan200/computercraft/shared/computer/blocks/TileComputerBase.java
+++ b/src/main/java/dan200/computercraft/shared/computer/blocks/TileComputerBase.java
@@ -76,7 +76,7 @@ public abstract class TileComputerBase extends TileGeneric
         unload();
         for( EnumFacing dir : EnumFacing.VALUES )
         {
-            RedstoneUtil.propogateRedstoneOutput( getWorld(), getPos(), dir );
+            RedstoneUtil.propagateRedstoneOutput( getWorld(), getPos(), dir );
         }
     }
 
@@ -380,7 +380,7 @@ public abstract class TileComputerBase extends TileGeneric
         updateBlock();
         for( EnumFacing dir : EnumFacing.VALUES )
         {
-            RedstoneUtil.propogateRedstoneOutput( getWorld(), getPos(), dir );
+            RedstoneUtil.propagateRedstoneOutput( getWorld(), getPos(), dir );
         }
     }
 
diff --git a/src/main/java/dan200/computercraft/shared/turtle/blocks/TileTurtle.java b/src/main/java/dan200/computercraft/shared/turtle/blocks/TileTurtle.java
index 382d6d984..44c42951e 100644
--- a/src/main/java/dan200/computercraft/shared/turtle/blocks/TileTurtle.java
+++ b/src/main/java/dan200/computercraft/shared/turtle/blocks/TileTurtle.java
@@ -141,7 +141,7 @@ public class TileTurtle extends TileComputerBase
             // Just turn off any redstone we had on
             for( EnumFacing dir : EnumFacing.VALUES )
             {
-                RedstoneUtil.propogateRedstoneOutput( getWorld(), getPos(), dir );
+                RedstoneUtil.propagateRedstoneOutput( getWorld(), getPos(), dir );
             }
         }
     }
diff --git a/src/main/java/dan200/computercraft/shared/util/RedstoneUtil.java b/src/main/java/dan200/computercraft/shared/util/RedstoneUtil.java
index 378322c6a..acbbe74fe 100644
--- a/src/main/java/dan200/computercraft/shared/util/RedstoneUtil.java
+++ b/src/main/java/dan200/computercraft/shared/util/RedstoneUtil.java
@@ -68,9 +68,9 @@ public class RedstoneUtil
         return 0;
     }
 
-    public static void propogateRedstoneOutput( World world, BlockPos pos, EnumFacing side )
+    public static void propagateRedstoneOutput( World world, BlockPos pos, EnumFacing side )
     {
-        // Propogate ordinary output
+        // Propagate ordinary output
         IBlockState block = world.getBlockState( pos );
         BlockPos neighbourPos = pos.offset( side );
         IBlockState neighbour = world.getBlockState( neighbourPos );
@@ -79,7 +79,7 @@ public class RedstoneUtil
             world.neighborChanged( neighbourPos, block.getBlock(), pos );
             if( neighbour.getBlock().isNormalCube( neighbour, world, neighbourPos ) )
             {
-                world.notifyNeighborsOfStateExcept( neighbourPos, neighbour.getBlock(), side.getOpposite() );
+                world.notifyNeighborsOfStateExcept( neighbourPos, block.getBlock(), side.getOpposite() );
             }
         }
     }