diff --git a/httpcore5/src/main/java/org/apache/hc/core5/http/ContentType.java b/httpcore5/src/main/java/org/apache/hc/core5/http/ContentType.java
index 9ce5121bb..ebee29731 100644
--- a/httpcore5/src/main/java/org/apache/hc/core5/http/ContentType.java
+++ b/httpcore5/src/main/java/org/apache/hc/core5/http/ContentType.java
@@ -184,7 +184,7 @@ public final class ContentType implements Serializable {
             "text/markdown", StandardCharsets.UTF_8, false);
 
     public static final ContentType TEXT_PLAIN = create(
-            "text/plain", StandardCharsets.UTF_8, true);
+            "text/plain", StandardCharsets.UTF_8, false);
     public static final ContentType TEXT_XML = create(
             "text/xml", StandardCharsets.UTF_8, false);
     /**
@@ -432,9 +432,7 @@ public static ContentType create(final String mimeType, final Charset charset) {
      * @param mimeType MIME type. It may not be {@code null} or empty. It may not contain
      *        characters {@code <">, <;>, <,>} reserved by the HTTP specification.
      * @return content type
-     * @deprecated Use {@link #create(String, Charset, boolean)} with an explicit charset or null, and specify if the charset is implicit.
      */
-    @Deprecated
     public static ContentType create(final String mimeType) {
         return create(mimeType, (Charset) null);
     }
diff --git a/httpcore5/src/test/java/org/apache/hc/core5/http/io/entity/TestStringEntity.java b/httpcore5/src/test/java/org/apache/hc/core5/http/io/entity/TestStringEntity.java
index 0b9cfa353..f6e370a91 100644
--- a/httpcore5/src/test/java/org/apache/hc/core5/http/io/entity/TestStringEntity.java
+++ b/httpcore5/src/test/java/org/apache/hc/core5/http/io/entity/TestStringEntity.java
@@ -66,7 +66,7 @@ void testDefaultContent() throws Exception {
         httpentity = new StringEntity(s, StandardCharsets.US_ASCII);
         Assertions.assertEquals("text/plain; charset=US-ASCII", httpentity.getContentType());
         httpentity = new StringEntity(s);
-        Assertions.assertEquals("text/plain", httpentity.getContentType());
+        Assertions.assertEquals("text/plain; charset=UTF-8", httpentity.getContentType());
     }
 
     private static String constructString(final int [] unicodeChars) {