diff --git a/modules/io/src/mol/mmcif_info.hh b/modules/io/src/mol/mmcif_info.hh
index 351f27bc0dd60858b3a773c8953d59ba52ab9a6a..389d7d1cd433eaf646634426c33f8bb10b5729a4 100644
--- a/modules/io/src/mol/mmcif_info.hh
+++ b/modules/io/src/mol/mmcif_info.hh
@@ -27,6 +27,7 @@
 #include <ost/string_ref.hh>
 #include <ost/io/module_config.hh>
 #include <ost/mol/mol.hh>
+#include <ost/io/io_exception.hh>
 
 namespace ost { namespace io {