diff --git a/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultGenerator.java b/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultGenerator.java
index 044818ad123..935ae8c103b 100644
--- a/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultGenerator.java
+++ b/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultGenerator.java
@@ -258,7 +258,7 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
             in = this.getClass().getClassLoader().getResourceAsStream(config.templateDir() + File.separator + support.templateFile);
           }
           File outputFile = new File(outputFilename);
-          OutputStream out = new FileOutputStream(outputFile, true);
+          OutputStream out = new FileOutputStream(outputFile, false);
           if(in != null && out != null)
             IOUtils.copy(in,out);
           else {