diff --git a/src/libvgcode/src/OptionTemplate.hpp b/src/libvgcode/src/OptionTemplate.hpp
index 75cd5276e5..ebb2b2ca50 100644
--- a/src/libvgcode/src/OptionTemplate.hpp
+++ b/src/libvgcode/src/OptionTemplate.hpp
@@ -6,6 +6,7 @@
 #define VGCODE_OPTIONTEMPLATE_HPP
 
 #include <cstdint>
+#include <cstddef>
 
 namespace libvgcode {
 
diff --git a/src/libvgcode/src/SegmentTemplate.hpp b/src/libvgcode/src/SegmentTemplate.hpp
index fd7462c407..868cb9f394 100644
--- a/src/libvgcode/src/SegmentTemplate.hpp
+++ b/src/libvgcode/src/SegmentTemplate.hpp
@@ -5,6 +5,8 @@
 #ifndef VGCODE_SEGMENTTEMPLATE_HPP
 #define VGCODE_SEGMENTTEMPLATE_HPP
 
+#include <cstddef>
+
 namespace libvgcode {
 
 class SegmentTemplate