diff --git a/lib/dns/dst_api.c b/lib/dns/dst_api.c
index 420aaf2a06..5b12e98b5a 100644
--- a/lib/dns/dst_api.c
+++ b/lib/dns/dst_api.c
@@ -31,7 +31,7 @@
 
 /*
  * Principal Author: Brian Wellington
- * $Id: dst_api.c,v 1.45 2009/10/27 22:25:37 marka Exp $
+ * $Id: dst_api.c,v 1.46 2009/11/03 19:43:54 marka Exp $
  */
 
 /*! \file */
@@ -162,6 +162,10 @@ dst_lib_init2(isc_mem_t *mctx, isc_entropy_t *ectx,
 #endif
 	REQUIRE(dst_initialized == ISC_FALSE);
 
+#ifndef OPENSSL
+	UNUSED(engine);
+#endif
+
 	dst__memory_pool = NULL;
 
 #if defined(OPENSSL) && defined(BIND9)