diff --git a/lib/dns/dnstap.c b/lib/dns/dnstap.c
index 072735b311..b475174e33 100644
--- a/lib/dns/dnstap.c
+++ b/lib/dns/dnstap.c
@@ -339,7 +339,7 @@ destroy(dns_dtenv_t *env) {
 void
 dns_dt_detach(dns_dtenv_t **envp) {
 	unsigned int refs;
-	dns_dtenv_t *env = *envp;
+	dns_dtenv_t *env;
 
 	REQUIRE(envp != NULL && VALID_DTENV(*envp));