diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Rails5ServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Rails5ServerCodegen.java
index 2c9d087927c1..0e978ce7d154 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Rails5ServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Rails5ServerCodegen.java
@@ -259,7 +259,9 @@ public class Rails5ServerCodegen extends DefaultCodegen implements CodegenConfig
     public String toModelName(String name) {
         // model name cannot use reserved keyword, e.g. return
         if (isReservedWord(name)) {
-            throw new RuntimeException(name + " (reserved word) cannot be used as a model name");
+            String modelName = camelize("Model" + name);
+            LOGGER.warn(name + " (reserved word) cannot be used as model name. Renamed to " + modelName);
+            return modelName;
         }
 
         // camelize the model name
@@ -271,7 +273,9 @@ public class Rails5ServerCodegen extends DefaultCodegen implements CodegenConfig
     public String toModelFilename(String name) {
         // model name cannot use reserved keyword, e.g. return
         if (isReservedWord(name)) {
-            throw new RuntimeException(name + " (reserved word) cannot be used as a model name");
+            String filename = underscore("model_" + name);
+            LOGGER.warn(name + " (reserved word) cannot be used as model filename. Renamed to " + filename);
+            return filename;
         }
 
         // underscore the model file name
@@ -301,7 +305,9 @@ public class Rails5ServerCodegen extends DefaultCodegen implements CodegenConfig
     public String toOperationId(String operationId) {
         // method name cannot use reserved keyword, e.g. return
         if (isReservedWord(operationId)) {
-            throw new RuntimeException(operationId + " (reserved word) cannot be used as method name");
+            String newOperationId = underscore("call_" + operationId);
+            LOGGER.warn(operationId + " (reserved word) cannot be used as method name. Renamed to " + newOperationId);
+            return newOperationId;
         }
 
         return underscore(operationId);