diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index a331d2549..5f471d0d6 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -1,6 +1,10 @@
 Changes since 4.1 ALPHA2
 -------------------
 
+* [HTTPCLIENT-960] HttpMultipart doesn't generate Content-Type header for binary parts in
+  BROWSER_COMPATIBLE mode.
+  Contributed by Oleg Kalnichevski <olegk at apache.org>
+
 * [HTTPCLIENT-989] DefaultHttpRequestRetryHandler no longer retries non-idempotent http methods 
   if NoHttpResponseException is thrown.
   Contributed by Oleg Kalnichevski <olegk at apache.org>
diff --git a/httpmime/src/main/java/org/apache/http/entity/mime/HttpMultipart.java b/httpmime/src/main/java/org/apache/http/entity/mime/HttpMultipart.java
index 5ec0b7f91..017238d94 100644
--- a/httpmime/src/main/java/org/apache/http/entity/mime/HttpMultipart.java
+++ b/httpmime/src/main/java/org/apache/http/entity/mime/HttpMultipart.java
@@ -73,6 +73,22 @@ public class HttpMultipart {
         writeBytes(b, out);
     }
 
+    private static void writeField(
+            final MinimalField field, final OutputStream out) throws IOException {
+        writeBytes(field.getName(), out);
+        writeBytes(FIELD_SEP, out);
+        writeBytes(field.getBody(), out);
+        writeBytes(CR_LF, out);
+    }
+
+    private static void writeField(
+            final MinimalField field, final Charset charset, final OutputStream out) throws IOException {
+        writeBytes(field.getName(), charset, out);
+        writeBytes(FIELD_SEP, out);
+        writeBytes(field.getBody(), charset, out);
+        writeBytes(CR_LF, out);
+    }
+
     private static final ByteArrayBuffer FIELD_SEP = encode(MIME.DEFAULT_CHARSET, ": ");
     private static final ByteArrayBuffer CR_LF = encode(MIME.DEFAULT_CHARSET, "\r\n");
     private static final ByteArrayBuffer TWO_DASHES = encode(MIME.DEFAULT_CHARSET, "--");
@@ -151,20 +167,19 @@ public class HttpMultipart {
             switch (mode) {
             case STRICT:
                 for (MinimalField field: header) {
-                    writeBytes(field.getName(), out);
-                    writeBytes(FIELD_SEP, out);
-                    writeBytes(field.getBody(), out);
-                    writeBytes(CR_LF, out);
+                    writeField(field, out);
                 }
                 break;
             case BROWSER_COMPATIBLE:
                 // Only write Content-Disposition
                 // Use content charset
                 MinimalField cd = part.getHeader().getField(MIME.CONTENT_DISPOSITION);
-                writeBytes(cd.getName(), this.charset, out);
-                writeBytes(FIELD_SEP, out);
-                writeBytes(cd.getBody(), this.charset, out);
-                writeBytes(CR_LF, out);
+                writeField(cd, this.charset, out);
+                String filename = part.getBody().getFilename();
+                if (filename != null) {
+                    MinimalField ct = part.getHeader().getField(MIME.CONTENT_TYPE);
+                    writeField(ct, this.charset, out);
+                }
                 break;
             }
             writeBytes(CR_LF, out);
diff --git a/httpmime/src/test/java/org/apache/http/entity/mime/TestMultipartForm.java b/httpmime/src/test/java/org/apache/http/entity/mime/TestMultipartForm.java
index dea3c8346..1e0f6068a 100644
--- a/httpmime/src/test/java/org/apache/http/entity/mime/TestMultipartForm.java
+++ b/httpmime/src/test/java/org/apache/http/entity/mime/TestMultipartForm.java
@@ -258,11 +258,13 @@ public class TestMultipartForm {
             "--foo\r\n" +
             "Content-Disposition: form-data; name=\"field1\"; " +
                 "filename=\"" + s1 + ".tmp\"\r\n" +
+            "Content-Type: application/octet-stream\r\n" +
             "\r\n" +
             "some random whatever\r\n" +
             "--foo\r\n" +
             "Content-Disposition: form-data; name=\"field2\"; " +
                 "filename=\"" + s2 + ".tmp\"\r\n" +
+            "Content-Type: application/octet-stream\r\n" +
             "\r\n" +
             "some random whatever\r\n" +
             "--foo--\r\n";