diff --git a/third_party/curl.BUILD b/third_party/curl.BUILD
index bd9709e4383..62fc946956d 100644
--- a/third_party/curl.BUILD
+++ b/third_party/curl.BUILD
@@ -186,6 +186,7 @@ cc_library(
         "lib/smtp.h",
         "lib/sockaddr.h",
         "lib/socketpair.h",
+        "lib/socketpair.c",
         "lib/socks.c",
         "lib/socks.h",
         "lib/speedcheck.c",