diff --git a/res/res_fax.c b/res/res_fax.c
index 25758de68a..bc0eb18f8e 100644
--- a/res/res_fax.c
+++ b/res/res_fax.c
@@ -3058,6 +3058,7 @@ static struct ast_frame *fax_gateway_framehook(struct ast_channel *chan, struct
 		 * write would fail, or even if a failure would be fatal so for
 		 * now we'll just ignore the return value. */
 		gateway->s->tech->write(gateway->s, f);
+		ast_frfree(f);
 		f = &ast_null_frame;
 		ao2_ref(details, -1);
 		return f;