diff --git a/ChangeLog b/ChangeLog
index 0c454a7e3519602c9cdb43ca1bae8901beac1f4a..cd43d9cafb8c510995a3c8487e4a00df352cd1db 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2014-02-13  Niels Möller  <nisse@lysator.liu.se>
+
+	* tools/nettle-pbkdf2.c (main): Added missing deallocation.
+
 2014-02-12  Niels Möller  <nisse@lysator.liu.se>
 
 	* chacha-poly1305.h: New file.
diff --git a/tools/nettle-pbkdf2.c b/tools/nettle-pbkdf2.c
index db7c535c2d68648171eedbf80179caaacd7b0340..cd24babab63ce00ed3b5d9a95580c842133e931c 100644
--- a/tools/nettle-pbkdf2.c
+++ b/tools/nettle-pbkdf2.c
@@ -173,6 +173,8 @@ main (int argc, char **argv)
       hex[BASE16_ENCODE_LENGTH(output_length - i)] = 0;
       printf("%s\n", hex);
     }
+  free (output);
+
   if (fflush(stdout) != 0 )
     die("Write failed: %s\n", STRERROR(errno));