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 31566b519..94cb335cd 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
@@ -29,6 +29,7 @@
 
 import java.io.Serializable;
 import java.nio.charset.Charset;
+import java.nio.charset.IllegalCharsetNameException;
 import java.nio.charset.StandardCharsets;
 import java.nio.charset.UnsupportedCharsetException;
 import java.util.ArrayList;
@@ -375,7 +376,7 @@ private static ContentType create(final String mimeType, final NameValuePair[] p
                     if (!TextUtils.isBlank(s)) {
                         try {
                             charset = Charset.forName(s);
-                        } catch (final UnsupportedCharsetException ex) {
+                        } catch (final UnsupportedCharsetException | IllegalCharsetNameException ex) {
                             if (strict) {
                                 throw ex;
                             }
diff --git a/httpcore5/src/test/java/org/apache/hc/core5/http/TestContentType.java b/httpcore5/src/test/java/org/apache/hc/core5/http/TestContentType.java
index c0e5c00f8..29e413cd9 100644
--- a/httpcore5/src/test/java/org/apache/hc/core5/http/TestContentType.java
+++ b/httpcore5/src/test/java/org/apache/hc/core5/http/TestContentType.java
@@ -191,4 +191,22 @@ void testWithParams() throws Exception {
         Assertions.assertEquals("text/blah; charset=ISO-8859-1; p=blah", contentType.toString());
     }
 
+    @Test
+    void testParseLenientIgnoresIllegalCharsetName() {
+        final ContentType contentType = ContentType.parseLenient("text/event-stream;charset=ISO-8859-1'");
+        Assertions.assertNotNull(contentType);
+        Assertions.assertEquals("text/event-stream", contentType.getMimeType());
+        Assertions.assertNull(contentType.getCharset());
+        Assertions.assertEquals("ISO-8859-1'", contentType.getParameter("charset"));
+    }
+
+    @Test
+    void testParseLenientIgnoresUnsupportedCharset() {
+        final ContentType contentType = ContentType.parseLenient("text/plain; charset=__no_such_charset__");
+        Assertions.assertNotNull(contentType);
+        Assertions.assertNull(contentType.getCharset());
+    }
+
+
+
 }