diff --git a/tiny_httpd.opam b/tiny_httpd.opam
index 1e50a45c..fc6d2c94 100644
--- a/tiny_httpd.opam
+++ b/tiny_httpd.opam
@@ -15,7 +15,7 @@ depends: [
   "ocaml" { >= "4.04.0" }
   "odoc" {with-doc}
   "qtest" { >= "2.9" & with-test}
-  "conf-libcurl" {with-test}
+  "conf-libcurl" {with-test & os="linux"}
   "qcheck" {with-test & >= "0.9" }
   "ounit2" {with-test}
   "ptime" {with-test}
diff --git a/tiny_httpd_camlzip.opam b/tiny_httpd_camlzip.opam
index 11da244a..a525fce1 100644
--- a/tiny_httpd_camlzip.opam
+++ b/tiny_httpd_camlzip.opam
@@ -13,6 +13,7 @@ depends: [
   "dune" { >= "2.0" }
   "camlzip" {>= "1.06"}
   "tiny_httpd" { = version }
+  "conf-libcurl" {with-test & os="linux"}
   "ocaml" { >= "4.04.0" }
   "odoc" {with-doc}
 ]