diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8097158..995cbc7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -232,6 +232,10 @@ if(WITH_GCRYPT AND LIBGCRYPT_LIBRARIES)
   set(ADDITIONAL_LIBS ${ADDITIONAL_LIBS} ${LIBGCRYPT_LIBRARIES})
 endif(WITH_GCRYPT AND LIBGCRYPT_LIBRARIES)
 
+if(GNUTLS_FOUND)
+  set(LIBVNCSERVER_HAVE_GNUTLS 1)
+endif(GNUTLS_FOUND)
+
 if(OPENSSL_FOUND)
   set(LIBVNCSERVER_HAVE_LIBSSL 1)
 endif(OPENSSL_FOUND)
diff --git a/rfb/rfbconfig.h.cmakein b/rfb/rfbconfig.h.cmakein
index 613149a..2d165c5 100644
--- a/rfb/rfbconfig.h.cmakein
+++ b/rfb/rfbconfig.h.cmakein
@@ -142,6 +142,9 @@
 /* Define to 1 if libgcrypt is present */
 #cmakedefine LIBVNCSERVER_WITH_CLIENT_GCRYPT 1
 
+/* Define to 1 if GnuTLS is present */
+#cmakedefine LIBVNCSERVER_HAVE_GNUTLS 1
+
 /* Define to 1 if OpenSSL is present */
 #cmakedefine LIBVNCSERVER_HAVE_LIBSSL 1