diff --git a/sdk/tools/txt2nls/main.cpp b/sdk/tools/txt2nls/main.cpp
index 8d5c473914f..796066ecf9a 100644
--- a/sdk/tools/txt2nls/main.cpp
+++ b/sdk/tools/txt2nls/main.cpp
@@ -11,6 +11,7 @@
 #include <vector>
 #include <cstring>
 #include <string>
+#include <cstdint>
 
 static const char whitespaces[] = " \t\f\v\n\r";
 static long line_number = -1;