diff --git a/NEWS b/NEWS
index 37db7e6c408..7b37e076b34 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,7 @@ PHP                                                                        NEWS
 - CLI server:
   . Fixed bug #65633 (built-in server treat some http headers as
     case-sensitive). (Adam)
+  . Added application/pdf to PHP CLI Web Server mime types (Chris Jones)
 
 - Datetime:
   . Fixed bug #65502 (DateTimeImmutable::createFromFormat returns DateTime).
diff --git a/sapi/cli/php_cli_server.c b/sapi/cli/php_cli_server.c
index d50cc4f8a03..e84d9ea97a3 100644
--- a/sapi/cli/php_cli_server.c
+++ b/sapi/cli/php_cli_server.c
@@ -268,6 +268,7 @@ static php_cli_server_ext_mime_type_pair mime_type_map[] = {
 	{ "jpg", "image/jpeg" },
 	{ "jpeg", "image/jpeg" },
 	{ "jpe", "image/jpeg" },
+	{ "pdf", "application/pdf" },
 	{ "png", "image/png" },
 	{ "svg", "image/svg+xml" },
 	{ "txt", "text/plain" },