diff --git a/CMakeLists.txt b/CMakeLists.txt
index 01b14e1..2ff1a7c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -321,7 +321,12 @@
   set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
 endif()
 check_function_exists(inet_aton HAVE_INET_ATON)
+# This might give a false positive on Windows as it is also guarded by
+# a version check that we do not satisfy (requires Vista, but we target
+# Windows 2000).
+if(NOT WIN32)
 check_function_exists(inet_pton HAVE_INET_PTON)
+endif()
 check_function_exists(getaddrinfo HAVE_GETADDRINFO)
 set(CMAKE_EXTRA_INCLUDE_FILES) 
 set(CMAKE_REQUIRED_LIBRARIES)