diff --git a/CMakeLists.txt b/CMakeLists.txt
index 621ae19d82..ee0cce08ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -675,11 +675,12 @@ if(NOT CURL_DISABLE_LDAPS)
   check_include_file_concat("ldapssl.h"  HAVE_LDAPSSL_H)
 endif()
 
-# Check for idn
+# Check for idn2
 option(USE_LIBIDN2 "Use libidn2 for IDN support" ON)
-set(HAVE_LIBIDN2 OFF)
 if(USE_LIBIDN2)
   check_library_exists_concat("idn2" idn2_lookup_ul HAVE_LIBIDN2)
+else()
+  set(HAVE_LIBIDN2 OFF)
 endif()
 
 if(WIN32)