diff --git a/contrib/apache/radicale.conf b/contrib/apache/radicale.conf
index 98a25a72..102dc794 100644
--- a/contrib/apache/radicale.conf
+++ b/contrib/apache/radicale.conf
@@ -43,10 +43,7 @@
 		RequestHeader    set X-Script-Name /radicale
 
 		RequestHeader    set X-Forwarded-Port "%{SERVER_PORT}s"
-		RequestHeader    unset X-Forwarded-Proto
-		<If "%{HTTPS} =~ /on/">
-			RequestHeader    set X-Forwarded-Proto "https"
-		</If>
+		RequestHeader    set X-Forwarded-Proto expr=%{REQUEST_SCHEME}
 
 		ProxyPass        http://localhost:5232/ retry=0
 		ProxyPassReverse http://localhost:5232/
@@ -172,7 +169,7 @@ CustomLog logs/ssl_request_log "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"
 		RequestHeader    set X-Script-Name /
 
 		RequestHeader    set X-Forwarded-Port "%{SERVER_PORT}s"
-		RequestHeader    set X-Forwarded-Proto "https"
+		RequestHeader    set X-Forwarded-Proto expr=%{REQUEST_SCHEME}
 
 		ProxyPass        http://localhost:5232/ retry=0
 		ProxyPassReverse http://localhost:5232/