diff --git a/CMakeLists.txt b/CMakeLists.txt
index eeb7c03b..17d37636 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,7 +69,8 @@ set_package_properties(ENCHANT PROPERTIES
     PURPOSE "Spell checking support via Enchant"
 )
 
-find_package(CURL)
+# v7.43.0+ required for CURL_AT_LEAST_VERSION() macro
+find_package(CURL 7.43.0)
 set_package_properties(CURL PROPERTIES
     DESCRIPTION "Command line tool and library for transferring data with URLs"
     URL "https://curl.se/"
diff --git a/kioslave/http/http.cpp b/kioslave/http/http.cpp
index 63d7fdfb..3c56a6f6 100644
--- a/kioslave/http/http.cpp
+++ b/kioslave/http/http.cpp
@@ -39,8 +39,7 @@ static inline curl_proxytype curlProxyType(const QString &proxy)
 {
     const QString proxyprotocol = KUrl(proxy).protocol();
 
-    // added in 7.52.0
-#ifdef CURLPROXY_HTTPS
+#if CURL_AT_LEAST_VERSION(7, 52, 0)
     if (proxyprotocol.startsWith(QLatin1String("https"))) {
         return CURLPROXY_HTTPS;
     }
@@ -79,7 +78,9 @@ static inline KIO::Error KIOError(const CURLcode curlcode)
         case CURLE_URL_MALFORMAT: {
             return KIO::ERR_MALFORMED_URL;
         }
+#if CURL_AT_LEAST_VERSION(7, 73, 0)
         case CURLE_PROXY:
+#endif
         case CURLE_COULDNT_RESOLVE_PROXY: {
             return KIO::ERR_UNKNOWN_PROXY_HOST;
         }