diff --git a/configure.ac b/configure.ac
index 1fc9d34d5..f6ee0a7c6 100755
--- a/configure.ac
+++ b/configure.ac
@@ -3612,7 +3612,6 @@ CURL_CHECK_FUNC_CLOSESOCKET
 CURL_CHECK_FUNC_CLOSESOCKET_CAMEL
 CURL_CHECK_FUNC_CONNECT
 CURL_CHECK_FUNC_FCNTL
-CURL_CHECK_FUNC_FDOPEN
 CURL_CHECK_FUNC_FREEADDRINFO
 CURL_CHECK_FUNC_FREEIFADDRS
 CURL_CHECK_FUNC_FSETXATTR