diff --git a/include/license++/license.h b/include/license++/license.h
index eab392d..b3a6e10 100644
--- a/include/license++/license.h
+++ b/include/license++/license.h
@@ -10,6 +10,7 @@
 #ifndef LICENSEPP_License_h
 #define LICENSEPP_License_h
 
+#include <stdint.h>
 #include <string>
 
 namespace licensepp {