diff --git a/include/cpptoml.h b/include/cpptoml.h
index 5a00da3..9ed2314 100644
--- a/include/cpptoml.h
+++ b/include/cpptoml.h
@@ -21,6 +21,7 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include <limits>
 
 #if __cplusplus > 201103L
 #define CPPTOML_DEPRECATED(reason) [[deprecated(reason)]]