diff --git a/openapi/preprocess_spec.py b/openapi/preprocess_spec.py
index 47b6d09..abb5eb6 100644
--- a/openapi/preprocess_spec.py
+++ b/openapi/preprocess_spec.py
@@ -235,7 +235,9 @@ def preserved_primitives_for_language(client_language):
         return ["intstr.IntOrString", "resource.Quantity", "v1.Patch"]
     elif client_language == "haskell-http-client":
         return ["intstr.IntOrString", "resource.Quantity"]
-    elif client_language == "typescript":
+    elif client_language.startswith("typescript"):
+        # Checking with the prefix because there are variations of
+        # typescript generators (e.g. typescript-fetch, typescript-jquery).
         return ["intstr.IntOrString"]
     else:
         return []
diff --git a/openapi/typescript-fetch.xml b/openapi/typescript-fetch.xml
index cd7b8fa..ef947bb 100644
--- a/openapi/typescript-fetch.xml
+++ b/openapi/typescript-fetch.xml
@@ -22,6 +22,9 @@
                             <inputSpec>${generator.spec.path}</inputSpec>
                             <skipValidateSpec>true</skipValidateSpec>
                             <generatorName>typescript-fetch</generatorName>
+                            <importMappings>
+                              IntOrString=../../types
+                            </importMappings>
                             <output>${generator.output.path}</output>
                             <configOptions>
                                 <sortParamsByRequiredFlag>true</sortParamsByRequiredFlag>
@@ -31,6 +34,7 @@
                                 <npmVersion>${generator.client.version}</npmVersion>
                                 <modelPropertyNaming>original</modelPropertyNaming>
                             </configOptions>
+                            <typeMappings>int-or-string=IntOrString</typeMappings>
                         </configuration>
                     </execution>
                 </executions>