diff --git a/packages/flexdll-windows/flexdll-windows.0.42/opam b/packages/flexdll-windows/flexdll-windows.0.42/opam
index 04a43420..b3d43945 100644
--- a/packages/flexdll-windows/flexdll-windows.0.42/opam
+++ b/packages/flexdll-windows/flexdll-windows.0.42/opam
@@ -69,6 +69,6 @@ extra-files: [
   ["patches/no-gcc_eh.patch" "md5=65bdd2a32d0777a9d8b315df91632166"]
 ]
 url {
-  src: "https://github.com/alainfrisch/flexdll/archive/0.42.tar.gz"
+  src: "https://github.com/ocaml/flexdll/archive/0.42.tar.gz"
   checksum: "9464ae7a7e566ba7c96336cf2f34cc73"
 }
diff --git a/packages/ocurl-windows/ocurl-windows.0.9.2/files/patches/undef.patch b/packages/ocurl-windows/ocurl-windows.0.9.2/files/patches/undef.patch
new file mode 100644
index 00000000..fc2b3902
--- /dev/null
+++ b/packages/ocurl-windows/ocurl-windows.0.9.2/files/patches/undef.patch
@@ -0,0 +1,18 @@
+diff --git a/curl-helper.c b/curl-helper.c
+index 6e3c748..9558cfa 100644
+--- a/curl-helper.c
++++ b/curl-helper.c
+@@ -3329,10 +3329,13 @@ SETOPT_LONG( BUFFERSIZE)
+   SETOPT_STRING( AWS_SIGV4)
+ #endif
+
++#undef TCP_KEEPALIVE
+ SETOPT_BOOL( TCP_KEEPALIVE)
+
++#undef TCP_KEEPIDLE
+ SETOPT_LONG( TCP_KEEPIDLE)
+
++#undef TCP_KEEPINTVL
+ SETOPT_LONG( TCP_KEEPINTVL)
+
+ /**
diff --git a/packages/ocurl-windows/ocurl-windows.0.9.2/opam b/packages/ocurl-windows/ocurl-windows.0.9.2/opam
index 8a1c8e15..30127e4c 100644
--- a/packages/ocurl-windows/ocurl-windows.0.9.2/opam
+++ b/packages/ocurl-windows/ocurl-windows.0.9.2/opam
@@ -25,6 +25,12 @@ build: [
     "@install"
   ]
 ]
+patches: [
+  "patches/undef.patch"
+]
+extra-files: [
+  ["patches/undef.patch" "md5=6a9b6d85af9f73c6c22ae918baa36ed9"]
+]
 depends: [
   "ocaml-windows" {>= "4.02.0"}
   "dune"