diff --git a/app/src/processing/app/Base.java b/app/src/processing/app/Base.java
index e83e443c9..4d7e8dd1c 100644
--- a/app/src/processing/app/Base.java
+++ b/app/src/processing/app/Base.java
@@ -40,7 +40,7 @@ import processing.core.*;
  * files and images, etc) that comes from that.
  */
 public class Base {
-  static final int REVISION = 18;
+  public static final int REVISION = 18;
   static String VERSION_NAME = "0018";
 
   static HashMap<Integer, String> platformNames = new HashMap<Integer, String>();
diff --git a/app/src/processing/app/debug/Compiler.java b/app/src/processing/app/debug/Compiler.java
index 56b5d27ac..198fd9847 100644
--- a/app/src/processing/app/debug/Compiler.java
+++ b/app/src/processing/app/debug/Compiler.java
@@ -452,6 +452,7 @@ public class Compiler implements MessageConsumer {
       "-assembler-with-cpp",
       "-mmcu=" + Preferences.get("boards." + Preferences.get("board") + ".build.mcu"),
       "-DF_CPU=" + Preferences.get("boards." + Preferences.get("board") + ".build.f_cpu"),
+      "-DARDUINO=" + Base.REVISION,
     }));
 
     for (int i = 0; i < includePaths.size(); i++) {
@@ -478,6 +479,7 @@ public class Compiler implements MessageConsumer {
       "-fdata-sections",
       "-mmcu=" + Preferences.get("boards." + Preferences.get("board") + ".build.mcu"),
       "-DF_CPU=" + Preferences.get("boards." + Preferences.get("board") + ".build.f_cpu"),
+      "-DARDUINO=" + Base.REVISION,
     }));
 		
     for (int i = 0; i < includePaths.size(); i++) {
@@ -505,6 +507,7 @@ public class Compiler implements MessageConsumer {
       "-fdata-sections",
       "-mmcu=" + Preferences.get("boards." + Preferences.get("board") + ".build.mcu"),
       "-DF_CPU=" + Preferences.get("boards." + Preferences.get("board") + ".build.f_cpu"),
+      "-DARDUINO=" + Base.REVISION,
     }));
 
     for (int i = 0; i < includePaths.size(); i++) {
diff --git a/hardware/cores/arduino/wiring.h b/hardware/cores/arduino/wiring.h
index df7c314f9..e6dcde17f 100755
--- a/hardware/cores/arduino/wiring.h
+++ b/hardware/cores/arduino/wiring.h
@@ -32,10 +32,6 @@
 extern "C"{
 #endif
 
-#ifndef ARDUINO
-#define ARDUINO 18
-#endif
-
 #define HIGH 0x1
 #define LOW  0x0