diff --git a/llmodel/llmodel.h b/llmodel/llmodel.h
index 5ef900f4..5e254ab5 100644
--- a/llmodel/llmodel.h
+++ b/llmodel/llmodel.h
@@ -4,6 +4,7 @@
 #include <string>
 #include <functional>
 #include <vector>
+#include <cstdint>
 
 class LLModel {
 public: