diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 6d19839fec..8291a980f4 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2020-01-04  Alan Modra  <amodra@gmail.com>
+
+	* mmo.c (mmo_mkobject): Allocate tdata with bfd_zalloc.
+
 2020-01-04  Alan Modra  <amodra@gmail.com>
 
 	* coffgen.c (coff_real_object_p): Free malloc'd memory on target
diff --git a/bfd/mmo.c b/bfd/mmo.c
index ca116aa42f..9ac689d042 100644
--- a/bfd/mmo.c
+++ b/bfd/mmo.c
@@ -579,7 +579,7 @@ mmo_mkobject (bfd *abfd)
 
       /* All fields are zero-initialized, so we don't have to explicitly
 	 initialize most.  */
-      tdata_type *tdata = (tdata_type *) bfd_zmalloc (sizeof (tdata_type));
+      tdata_type *tdata = (tdata_type *) bfd_zalloc (abfd, sizeof (tdata_type));
       if (tdata == NULL)
 	return FALSE;