diff --git a/dirmngr/dns-stuff.c b/dirmngr/dns-stuff.c
index 728f662ae..cb0456af4 100644
--- a/dirmngr/dns-stuff.c
+++ b/dirmngr/dns-stuff.c
@@ -95,9 +95,8 @@
 #ifndef T_SRV
 #define T_SRV 33
 #endif
-#ifndef T_CERT
-# define T_CERT 37
-#endif
+#undef T_CERT
+#define T_CERT 37
 
 /* The standard SOCKS and TOR ports.  */
 #define SOCKS_PORT 1080