diff --git a/CHANGES b/CHANGES
index f2760a0b..704d0ae5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -21,6 +21,7 @@ v2.0.0 (TBA)
 -Fixed (issue #326) - Fixed PNG increasing brightness on build (Thanks Christiaan)
 -Fixed (issue #448) - Merge smali2 into Apktool
 -Fixed (issue #496) - Fixes Windows builds caused by java.nio problems
+-Fixed (issue #510) - Any error output is sent stderr instead of stdout
 -Updated known bytes for configurations to 38 (from addition of layout direction)
 -Fixed NPE when handling odex apks even with --no-src specified. (Thanks Rodrigo Chiossi)
 
diff --git a/brut.apktool/apktool-cli/src/main/java/brut/apktool/Main.java b/brut.apktool/apktool-cli/src/main/java/brut/apktool/Main.java
index f3e6ebfc..727c8521 100644
--- a/brut.apktool/apktool-cli/src/main/java/brut/apktool/Main.java
+++ b/brut.apktool/apktool-cli/src/main/java/brut/apktool/Main.java
@@ -60,7 +60,7 @@ public class Main {
         try {
             commandLine = parser.parse(allOptions, args, false);
         } catch (ParseException ex) {
-            System.out.println(ex.getMessage());
+            System.err.println(ex.getMessage());
             usage(commandLine);
             return;
         }
@@ -165,24 +165,24 @@ public class Main {
         try {
             decoder.decode();
         } catch (OutDirExistsException ex) {
-            System.out
+            System.err
                     .println("Destination directory ("
                             + outDir.getAbsolutePath()
                             + ") "
                             + "already exists. Use -f switch if you want to overwrite it.");
             System.exit(1);
         } catch (InFileNotFoundException ex) {
-            System.out.println("Input file (" + apkName + ") " + "was not found or was not readable.");
+            System.err.println("Input file (" + apkName + ") " + "was not found or was not readable.");
             System.exit(1);
         } catch (CantFindFrameworkResException ex) {
-            System.out
+            System.err
                     .println("Can't find framework resources for package of id: "
                             + String.valueOf(ex.getPkgId())
                             + ". You must install proper "
                             + "framework files, see project website for more info.");
             System.exit(1);
         } catch (IOException ex) {
-            System.out.println("Could not modify file. Please ensure you have permission.");
+            System.err.println("Could not modify file. Please ensure you have permission.");
             System.exit(1);
         }
 
diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java
index 26d10497..97a034e2 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java
@@ -791,7 +791,7 @@ final public class AndrolibResources {
         if (!dir.exists()) {
             if (!dir.mkdirs()) {
                 if (sFrameworkFolder != null) {
-                    System.out.println("Can't create Framework directory: "
+                    System.err.println("Can't create Framework directory: "
                             + dir);
                 }
                 throw new AndrolibException("Can't create directory: " + dir);
diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/src/DebugInjector.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/src/DebugInjector.java
index 83a3876c..fd94bc42 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/src/DebugInjector.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/src/DebugInjector.java
@@ -155,9 +155,9 @@ public class DebugInjector {
                     localType = "D";
                     break;
                 default:
-                    System.out.println(line);
-                    System.out.println(m.group(2));
-                    System.out.println(m.group(3));
+                    System.err.println(line);
+                    System.err.println(m.group(2));
+                    System.err.println(m.group(3));
                     assert false;
             }