diff --git a/src/include/h5core/h5_types.h b/src/include/h5core/h5_types.h
index 6be4a30..747c9e7 100644
--- a/src/include/h5core/h5_types.h
+++ b/src/include/h5core/h5_types.h
@@ -2,6 +2,7 @@
 #define __H5_TYPES_H
 
 #include <hdf5.h>
+#include <stdarg.h>
 
 /*
   file modes: