diff --git a/libctf/ChangeLog b/libctf/ChangeLog
index c5d52f29d6..d4a94bb27c 100644
--- a/libctf/ChangeLog
+++ b/libctf/ChangeLog
@@ -1,3 +1,8 @@
+2021-03-25  Nick Alcock  <nick.alcock@oracle.com>
+
+	* testsuite/libctf-writable/symtypetab-nonlinker-writeout.c: Don't
+	leak buf.
+
 2021-03-25  Nick Alcock  <nick.alcock@oracle.com>
 
 	PR libctf/27628
diff --git a/libctf/testsuite/libctf-writable/symtypetab-nonlinker-writeout.c b/libctf/testsuite/libctf-writable/symtypetab-nonlinker-writeout.c
index 98144de639..bdc3faa944 100644
--- a/libctf/testsuite/libctf-writable/symtypetab-nonlinker-writeout.c
+++ b/libctf/testsuite/libctf-writable/symtypetab-nonlinker-writeout.c
@@ -202,6 +202,7 @@ try_maybe_reporting (int report)
     }
 
   ctf_file_close (fp);
+  free (buf);
 
   return;