diff --git a/src/libslic3r/Model.hpp b/src/libslic3r/Model.hpp
index 688f78991..a6ccc6ca1 100644
--- a/src/libslic3r/Model.hpp
+++ b/src/libslic3r/Model.hpp
@@ -701,7 +701,8 @@ enum class EnforcerBlockerType : int8_t {
     Extruder13,
     Extruder14,
     Extruder15,
-    ExtruderMax
+    Extruder16,
+    ExtruderMax = Extruder16
 };
 
 enum class ConversionType : int {