diff --git a/lib/krb5/test_crypto.c b/lib/krb5/test_crypto.c
index 07a4d74e2..672a20388 100644
--- a/lib/krb5/test_crypto.c
+++ b/lib/krb5/test_crypto.c
@@ -83,6 +83,7 @@ time_encryption(krb5_context context, size_t size,
 	   etype_name, (unsigned long)size, iterations,
 	   (long)tv2.tv_sec, (long)tv2.tv_usec);
 
+    free(buf);
     krb5_crypto_destroy(context, crypto);
     krb5_free_keyblock_contents(context, &key);
 }