diff --git a/src/libmtime.f90 b/src/libmtime.f90
index eeeea119dd252ba3cc4b0eea1c54584257df8f76..04d028266b796ba47b2591393623f89144fe3d13 100644
--- a/src/libmtime.f90
+++ b/src/libmtime.f90
@@ -145,7 +145,8 @@ end module mtime_calendar
 
 MODULE mtime_juliandelta
   !
-  USE, INTRINSIC :: iso_c_binding, ONLY: c_int64_t, c_char, c_ptr, c_loc, c_associated
+  USE, INTRINSIC :: iso_c_binding, ONLY: c_int64_t, c_char, c_ptr, c_loc, &
+       c_associated, c_f_pointer
   !
   IMPLICIT NONE
   !