diff --git a/bbb-common-web/src/main/java/org/bigbluebutton/api/model/constraint/ContentTypeConstraint.java b/bbb-common-web/src/main/java/org/bigbluebutton/api/model/constraint/ContentTypeConstraint.java
index 31d8ef7d1a..ff80a83a40 100644
--- a/bbb-common-web/src/main/java/org/bigbluebutton/api/model/constraint/ContentTypeConstraint.java
+++ b/bbb-common-web/src/main/java/org/bigbluebutton/api/model/constraint/ContentTypeConstraint.java
@@ -16,7 +16,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 public @interface ContentTypeConstraint {
 
     String key() default "contentTypeError";
-    String message() default "Request content type is not supported";
+    String message() default "Request content type is not supported or no Content-Type header was specified";
     Class<?>[] groups() default {};
     Class<? extends Payload>[] payload() default {};
 }
diff --git a/bbb-common-web/src/main/java/org/bigbluebutton/api/model/validator/ContentTypeValidator.java b/bbb-common-web/src/main/java/org/bigbluebutton/api/model/validator/ContentTypeValidator.java
index e302c8d1b9..7992c12258 100644
--- a/bbb-common-web/src/main/java/org/bigbluebutton/api/model/validator/ContentTypeValidator.java
+++ b/bbb-common-web/src/main/java/org/bigbluebutton/api/model/validator/ContentTypeValidator.java
@@ -28,11 +28,12 @@ public class ContentTypeValidator implements ConstraintValidator<ContentTypeCons
     public boolean isValid(HttpServletRequest request, ConstraintValidatorContext context) {
         String requestMethod = request.getMethod();
         String contentType = request.getContentType();
+        String contentTypeHeader = request.getHeader("Content-Type");
         log.info("Validating {} request with content type {}", requestMethod, contentType);
 
         boolean requestBodyPresent = request.getContentLength() > 0;
         if (requestBodyPresent) {
-            if (contentType == null) return false;
+            if (contentType == null || contentTypeHeader == null) return false;
             else {
                 return SUPPORTED_CONTENT_TYPES.contains(contentType);
             }