diff --git a/httpd/page_impl.c b/httpd/page_impl.c
index 09c60b0..761f554 100644
--- a/httpd/page_impl.c
+++ b/httpd/page_impl.c
@@ -243,14 +243,16 @@ void send_basic_info(void)
 	slen += strtox(outbuf + slen, "\",\"flash_size\":\"");
 	string_to_html(get_flash_size_str());
 
-	slen += strtox(outbuf + slen, "\",\"sfp_slot_0\":\"");
-	send_sfp_info(0);
-	char_to_html('"');
-	if (machine.n_sfp == 2) {
-		slen += strtox(outbuf + slen, ",\"sfp_slot_1\":\"");
-		send_sfp_info(1);
-		char_to_html('"');
+	if (machine.n_sfp) {
+		slen += strtox(outbuf + slen, "\",\"sfp_slot_0\":\"");
+		send_sfp_info(0);
+		if (machine.n_sfp == 2) {
+			slen += strtox(outbuf + slen, "\",\"sfp_slot_1\":\"");
+			send_sfp_info(1);
+		}
 	}
+	char_to_html('"');
+
 	char_to_html('}');
 }