diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/core/machines/MachineProcessor.java b/src/main/java/io/github/thebusybiscuit/slimefun4/core/machines/MachineProcessor.java
index dd2349e196..9ec92b578a 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/core/machines/MachineProcessor.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/core/machines/MachineProcessor.java
@@ -187,7 +187,7 @@ public boolean startOperation(@Nonnull BlockPosition pos, @Nonnull T operation)
      *         {@link MachineOperation} to begin with.
      */
     public boolean endOperation(@Nonnull Location loc) {
-        Validate.notNull(b, "The Block should not be null");
+        Validate.notNull(loc, "The location should not be null");
 
         return endOperation(new BlockPosition(loc));
     }
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/geo/GEOMiner.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/geo/GEOMiner.java
index e8bc21fa64..cc09eb0ac6 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/geo/GEOMiner.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/geo/GEOMiner.java
@@ -121,7 +121,7 @@ public int getSpeed() {
      * 
      * @return This method will return the current instance of {@link GEOMiner}, so that can be chained.
      */
-    public final @Nonnull GEOMiner setCapacity(int capacity) {
+    public final GEOMiner setCapacity(int capacity) {
         Validate.isTrue(capacity > 0, "The capacity must be greater than zero!");
 
         if (getState() == ItemState.UNREGISTERED) {
@@ -193,7 +193,7 @@ private BlockPlaceHandler onBlockPlace() {
         return new BlockPlaceHandler(false) {
 
             @Override
-            public void onPlayerPlace( BlockPlaceEvent e) {
+            public void onPlayerPlace(BlockPlaceEvent e) {
                 updateHologram(e.getBlock(), "&7Idling...");
             }
         };