diff --git a/src/wp-includes/class-http.php b/src/wp-includes/class-http.php
index d07b77ae10..45eeeaf1a1 100644
--- a/src/wp-includes/class-http.php
+++ b/src/wp-includes/class-http.php
@@ -359,6 +359,9 @@ class WP_Http {
 			}
 		}
 
+		// Avoid issues where mbstring.func_overload is enabled
+		mbstring_binary_safe_encoding();
+
 		try {
 			$requests_response = Requests::request( $url, $headers, $data, $type, $options );
 
@@ -373,6 +376,8 @@ class WP_Http {
 			$response = new WP_Error( 'http_request_failed', $e->getMessage() );
 		}
 
+		reset_mbstring_encoding();
+
 		/**
 		 * Fires after an HTTP API response is received and before the response is returned.
 		 *