diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index b9ca1065b18c..e8f8a81aeb9b 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,8 @@
+2016-07-29  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
+	* trans-array.c (gfc_conv_array_ref): Fix allocation of diagnostic
+	message (was too small).
+
 2016-07-28  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/71067
diff --git a/gcc/fortran/trans-array.c b/gcc/fortran/trans-array.c
index e95c8dd82353..7572755a7a6d 100644
--- a/gcc/fortran/trans-array.c
+++ b/gcc/fortran/trans-array.c
@@ -3332,7 +3332,7 @@ gfc_conv_array_ref (gfc_se * se, gfc_array_ref * ar, gfc_expr *expr,
 	  if (ref->type == REF_ARRAY && &ref->u.ar == ar)
 	    break;
 	  if (ref->type == REF_COMPONENT)
-	    len += 1 + strlen (ref->u.c.component->name);
+	    len += 2 + strlen (ref->u.c.component->name);
 	}
 
       var_name = XALLOCAVEC (char, len);