diff --git a/xs/src/xsinit.h b/xs/src/xsinit.h
index f14e1262dc..2082dfb883 100644
--- a/xs/src/xsinit.h
+++ b/xs/src/xsinit.h
@@ -40,7 +40,7 @@
 // #include <libslic3r.h>
 
 #ifdef SLIC3RXS
-extern "C" {
+// extern "C" {
 #include "EXTERN.h"
 #include "perl.h"
 #include "XSUB.h"
@@ -88,7 +88,7 @@ extern "C" {
 #undef Zero
 #undef Packet
 #undef _
-}
+// }
 #endif
 
 #include <ClipperUtils.hpp>