diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0162cb6e3..622ec6c91 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,7 +92,7 @@ find_package(Backtrace QUIET)
 if(Backtrace_FOUND)
   set(HAVE_BACKTRACE ON)
 endif()
-find_package(GnuTLS)
+find_package(GnuTLS REQUIRED)
 find_package(Protobuf REQUIRED)
 find_library(PROTOBUF_STATIC_LIBRARY libprotobuf.a libprotobuf)
 if(LINUX)