diff --git a/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultCodegen.java b/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultCodegen.java
index 2abcfad31eac..1b3ddc524cad 100644
--- a/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultCodegen.java
+++ b/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultCodegen.java
@@ -314,7 +314,7 @@ public class DefaultCodegen {
   }
 
   public String snakeCase(String name) {
-    return Character.toLowerCase(name.charAt(0)) + name.substring(1);
+      return (name.length() > 0) ? (Character.toLowerCase(name.charAt(0)) + name.substring(1)) : "";
   }
 
   public String initialCaps(String name) {