diff --git a/config-post.h b/config-post.h
index d371e8c6cc..8367200f9c 100644
--- a/config-post.h
+++ b/config-post.h
@@ -34,6 +34,7 @@
 # undef WITH_CURL
 # undef WITH_DTRACE_PROBES
 # undef WITH_GNUTLS
+# undef WITH_GNUTLS_GCRYPT
 # undef WITH_MACVTAP
 # undef WITH_NUMACTL
 # undef WITH_SASL