diff --git a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/multipart/MultipartTextWithoutFilenameTest.java b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/multipart/MultipartTextWithoutFilenameTest.java
new file mode 100644
index 0000000000000..c774985eaf5fb
--- /dev/null
+++ b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/multipart/MultipartTextWithoutFilenameTest.java
@@ -0,0 +1,52 @@
+package io.quarkus.resteasy.reactive.server.test.multipart;
+
+import static io.restassured.RestAssured.given;
+
+import java.io.IOException;
+import java.util.function.Supplier;
+
+import jakarta.ws.rs.FormParam;
+import jakarta.ws.rs.POST;
+import jakarta.ws.rs.Path;
+
+import org.jboss.resteasy.reactive.RestResponse;
+import org.jboss.shrinkwrap.api.ShrinkWrap;
+import org.jboss.shrinkwrap.api.spec.JavaArchive;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.test.QuarkusUnitTest;
+
+public class MultipartTextWithoutFilenameTest {
+
+    @RegisterExtension
+    static QuarkusUnitTest test = new QuarkusUnitTest()
+            .setArchiveProducer(new Supplier<>() {
+                @Override
+                public JavaArchive get() {
+                    return ShrinkWrap.create(JavaArchive.class)
+                            .addClasses(Resource.class);
+                }
+            });
+
+    @Test
+    public void test() throws IOException {
+        given()
+                .contentType("multipart/form-data")
+                .multiPart("firstParam", "{\"id\":\"myId\",\"name\":\"myName\"}", "application/json")
+                .when()
+                .post("/test")
+                .then()
+                .statusCode(200);
+    }
+
+    @Path("/test")
+    public static class Resource {
+
+        @POST
+        public RestResponse<Void> testMultipart(@FormParam("firstParam") final String firstParam,
+                @FormParam("secondParam") final String secondParam) {
+            return RestResponse.ok();
+        }
+    }
+}
diff --git a/independent-projects/resteasy-reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/util/MediaTypeHelper.java b/independent-projects/resteasy-reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/util/MediaTypeHelper.java
index 81cedd7b62c60..ce799d31a24d6 100644
--- a/independent-projects/resteasy-reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/util/MediaTypeHelper.java
+++ b/independent-projects/resteasy-reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/util/MediaTypeHelper.java
@@ -267,10 +267,12 @@ public static boolean equivalentParams(MediaType m1, MediaType m2) {
         return true;
     }
 
+    // TODO: does this need to be more complex?
     public static boolean isTextLike(MediaType mediaType) {
-        return "text".equalsIgnoreCase(mediaType.getType())
-                || ("application".equalsIgnoreCase(mediaType.getType())
-                        && mediaType.getSubtype().toLowerCase().startsWith("xml"));
+        String type = mediaType.getType();
+        String subtype = mediaType.getSubtype();
+        return (type.equals("application") && (subtype.contains("json") || subtype.contains("xml") || subtype.contains("yaml")))
+                || type.equals("text");
     }
 
     public static boolean isUnsupportedWildcardSubtype(MediaType mediaType) {
diff --git a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/EncodedMediaType.java b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/EncodedMediaType.java
index c219865d5efa8..1c3c4310be4c9 100644
--- a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/EncodedMediaType.java
+++ b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/EncodedMediaType.java
@@ -5,6 +5,7 @@
 
 import jakarta.ws.rs.core.MediaType;
 
+import org.jboss.resteasy.reactive.common.util.MediaTypeHelper;
 import org.jboss.resteasy.reactive.server.spi.ContentType;
 
 /**
@@ -21,7 +22,7 @@ public EncodedMediaType(MediaType mediaType) {
         MediaType effectiveMediaType = mediaType;
         String effectiveCharset;
         String originalCharset = mediaType.getParameters().get("charset");
-        if (isStringMediaType(mediaType)) {
+        if (MediaTypeHelper.isTextLike(mediaType)) {
             effectiveCharset = originalCharset;
             if (effectiveCharset == null) {
                 effectiveCharset = StandardCharsets.UTF_8.name();
@@ -38,12 +39,6 @@ public EncodedMediaType(MediaType mediaType) {
     }
 
     // TODO: does this need to be more complex?
-    private boolean isStringMediaType(MediaType mediaType) {
-        String type = mediaType.getType();
-        String subtype = mediaType.getSubtype();
-        return (type.equals("application") && (subtype.contains("json") || subtype.contains("xml") || subtype.contains("yaml")))
-                || type.equals("text");
-    }
 
     @Override
     public String toString() {
diff --git a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/multipart/MultiPartParserDefinition.java b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/multipart/MultiPartParserDefinition.java
index 42ed5899e7356..1cea966a9e0b1 100644
--- a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/multipart/MultiPartParserDefinition.java
+++ b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/multipart/MultiPartParserDefinition.java
@@ -29,6 +29,7 @@
 import org.jboss.logging.Logger;
 import org.jboss.resteasy.reactive.common.headers.HeaderUtil;
 import org.jboss.resteasy.reactive.common.util.CaseInsensitiveMap;
+import org.jboss.resteasy.reactive.common.util.MediaTypeHelper;
 import org.jboss.resteasy.reactive.server.core.ResteasyReactiveRequestContext;
 import org.jboss.resteasy.reactive.server.spi.ServerHttpRequest;
 
@@ -366,7 +367,7 @@ private boolean isText(String contentType) {
             if (contentType == null || contentType.isEmpty()) { // https://www.rfc-editor.org/rfc/rfc7578.html#section-4.4 says the default content-type if missing is text/plain
                 return true;
             }
-            return MediaType.TEXT_PLAIN_TYPE.isCompatible(MediaType.valueOf(contentType));
+            return MediaTypeHelper.isTextLike(MediaType.valueOf(contentType));
         }
 
         public List<Path> getCreatedFiles() {