diff --git a/arduino-core/src/cc/arduino/packages/discoverers/SerialDiscovery.java b/arduino-core/src/cc/arduino/packages/discoverers/SerialDiscovery.java
index 3e6646d67..91d85376f 100644
--- a/arduino-core/src/cc/arduino/packages/discoverers/SerialDiscovery.java
+++ b/arduino-core/src/cc/arduino/packages/discoverers/SerialDiscovery.java
@@ -41,7 +41,7 @@ public class SerialDiscovery implements Discovery {
 
   private Timer serialBoardsListerTimer;
   private final List<BoardPort> serialBoardPorts;
-  private SerialBoardsLister serialBoardsLister = new SerialBoardsLister(this);;
+  private SerialBoardsLister serialBoardsLister = new SerialBoardsLister(this);
 
   public SerialDiscovery() {
     this.serialBoardPorts = new LinkedList<>();
diff --git a/arduino-core/src/processing/app/BaseNoGui.java b/arduino-core/src/processing/app/BaseNoGui.java
index f21d593bc..5c010b733 100644
--- a/arduino-core/src/processing/app/BaseNoGui.java
+++ b/arduino-core/src/processing/app/BaseNoGui.java
@@ -406,7 +406,7 @@ public class BaseNoGui {
 	  return boardManagerLink;
   }
 
-  protected static PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(BaseNoGui.class);;
+  protected static PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(BaseNoGui.class);
 
   public static void setBoardManagerLink(String temp) {
 	  boardManagerLink = temp;
diff --git a/arduino-core/src/processing/app/Platform.java b/arduino-core/src/processing/app/Platform.java
index 3afe36248..05eab1481 100644
--- a/arduino-core/src/processing/app/Platform.java
+++ b/arduino-core/src/processing/app/Platform.java
@@ -155,7 +155,7 @@ public class Platform {
 
   static {
     loadLib(new File(BaseNoGui.getContentFile("lib"), System.mapLibraryName("listSerialsj")));
-  };
+  }
 
   private static void loadLib(File lib) {
     try {
diff --git a/arduino-core/src/processing/app/SketchFile.java b/arduino-core/src/processing/app/SketchFile.java
index 19d300065..219bc5907 100644
--- a/arduino-core/src/processing/app/SketchFile.java
+++ b/arduino-core/src/processing/app/SketchFile.java
@@ -72,7 +72,7 @@ public class SketchFile {
 
     /** Clear the isModified() result value */
     public void clearModified();
-  };
+  }
 
   /**
    * A storage for this file's text. This can be set by a GUI, so we can