diff --git a/pac_unix.go b/pac_unix.go
index d4613cf..3a659eb 100644
--- a/pac_unix.go
+++ b/pac_unix.go
@@ -1,5 +1,6 @@
 //go:build !windows && (!darwin || !cgo)
-// +build !windows,!darwin !cgo
+// +build !windows
+// +build !darwin !cgo
 
 package ieproxy
 
diff --git a/proxy_middleman_darwin.go b/proxy_middleman_darwin.go
index a89948d..6ad98b2 100644
--- a/proxy_middleman_darwin.go
+++ b/proxy_middleman_darwin.go
@@ -1,3 +1,6 @@
+//go:build !ios && !iossimulator
+// +build !ios,!iossimulator
+
 package ieproxy
 
 import (
diff --git a/proxy_middleman_ios.go b/proxy_middleman_ios.go
new file mode 100644
index 0000000..5308e55
--- /dev/null
+++ b/proxy_middleman_ios.go
@@ -0,0 +1,14 @@
+//go:build ios || iossimulator
+// +build ios iossimulator
+
+package ieproxy
+
+import (
+	"net/http"
+	"net/url"
+)
+
+func proxyMiddleman() func(req *http.Request) (i *url.URL, e error) {
+	// Fallthrough to ProxyFromEnvironment on all other OSes.
+	return http.ProxyFromEnvironment
+}