diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JaxRSServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JaxRSServerCodegen.java
index 8f0a623f0823..063b002596cf 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JaxRSServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JaxRSServerCodegen.java
@@ -171,7 +171,7 @@ public class JaxRSServerCodegen extends JavaClientCodegen implements CodegenConf
         if (name.length() == 0) {
             return "DefaultApi";
         }
-        name = name.replaceAll("[^a-zA-Z ]+", "_");
+        name = name.replaceAll("[^a-zA-Z0-9]+", "_");
         return camelize(name) + "Api";
     }