diff --git a/src/templates/core/fetch/getRequestBody.hbs b/src/templates/core/fetch/getRequestBody.hbs
index 97b148eb..84b3a511 100644
--- a/src/templates/core/fetch/getRequestBody.hbs
+++ b/src/templates/core/fetch/getRequestBody.hbs
@@ -3,7 +3,7 @@ function getRequestBody(options: ApiRequestOptions): BodyInit | undefined {
         return getFormData(options.formData);
     }
     if (options.body) {
-        if (options.bodyMediaType.includes('/json')) {
+        if (options.bodyMediaType?.includes('/json')) {
             return JSON.stringify(options.body)
         } else if (isString(options.body) || isBlob(options.body)) {
             return options.body;
diff --git a/src/templates/core/node/getRequestBody.hbs b/src/templates/core/node/getRequestBody.hbs
index 97b148eb..d66c3500 100644
--- a/src/templates/core/node/getRequestBody.hbs
+++ b/src/templates/core/node/getRequestBody.hbs
@@ -3,9 +3,9 @@ function getRequestBody(options: ApiRequestOptions): BodyInit | undefined {
         return getFormData(options.formData);
     }
     if (options.body) {
-        if (options.bodyMediaType.includes('/json')) {
+        if (options.bodyMediaType?.includes('/json')) {
             return JSON.stringify(options.body)
-        } else if (isString(options.body) || isBlob(options.body)) {
+        } else if (isString(options.body) || isBinary(options.body)) {
             return options.body;
         } else {
             return JSON.stringify(options.body);
diff --git a/src/templates/core/xhr/getRequestBody.hbs b/src/templates/core/xhr/getRequestBody.hbs
index 19d6bc51..a374fb0f 100644
--- a/src/templates/core/xhr/getRequestBody.hbs
+++ b/src/templates/core/xhr/getRequestBody.hbs
@@ -3,7 +3,7 @@ function getRequestBody(options: ApiRequestOptions): any {
         return getFormData(options.formData);
     }
     if (options.body) {
-        if (options.bodyMediaType.includes('/json')) {
+        if (options.bodyMediaType?.includes('/json')) {
             return JSON.stringify(options.body)
         } else if (isString(options.body) || isBlob(options.body)) {
             return options.body;