diff --git a/include/hdf4cpp/HdfException.h b/include/hdf4cpp/HdfException.h
index 233ee43..354c3d3 100644
--- a/include/hdf4cpp/HdfException.h
+++ b/include/hdf4cpp/HdfException.h
@@ -6,6 +6,7 @@
 #define HDF4CPP_HDFEXCEPTION_H
 
 #include <hdf4cpp/HdfDefines.h>
+#include <string>
 
 namespace hdf4cpp {