diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 511458f89d3..167a0f9714f 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,9 @@
+2016-10-21  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libfortran/78055
+	* io/io.h (st_parameter_dt): Restore GFC_IO_INT to maintain
+	alignment.
+
 2016-10-20  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	* io/transfer.c (finalize_transfer): Free format data in child
diff --git a/libgfortran/io/io.h b/libgfortran/io/io.h
index edc520a920f..8b20389d74d 100644
--- a/libgfortran/io/io.h
+++ b/libgfortran/io/io.h
@@ -514,6 +514,7 @@ typedef struct st_parameter_dt
 	     large enough to hold a complex value (two reals) of the
 	     largest kind.  */
 	  char value[32];
+	  GFC_IO_INT not_used; /* Needed for alignment. */
 	  formatted_dtio fdtio_ptr;
 	  unformatted_dtio ufdtio_ptr;
 	} p;