diff --git a/fortran/grib_fortran.c b/fortran/grib_fortran.c
index 412de254f..07dc4a9e6 100644
--- a/fortran/grib_fortran.c
+++ b/fortran/grib_fortran.c
@@ -98,7 +98,7 @@ struct l_grib_file {
     FILE* f;
     char* buffer;
     int id;
-    int mode; /* enum FileMode */
+    FileMode mode;
     l_grib_file* next;
 };