diff --git a/include/maddy/blockparser.h b/include/maddy/blockparser.h
index 6a2d2f7..5aeed5f 100644
--- a/include/maddy/blockparser.h
+++ b/include/maddy/blockparser.h
@@ -9,6 +9,9 @@
 #include <functional>
 #include <sstream>
 #include <string>
+// windows compatibility includes
+#include <cctype>
+#include <algorithm>
 
 // -----------------------------------------------------------------------------