diff --git a/src/mbgl/util/mapbox.cpp b/src/mbgl/util/mapbox.cpp
index f3fded0cd..5d9c630c1 100644
--- a/src/mbgl/util/mapbox.cpp
+++ b/src/mbgl/util/mapbox.cpp
@@ -26,8 +26,7 @@ std::string normalizeSourceURL(const std::string& url, const std::string& access
 
     // TileJSON requests need a secure flag appended to their URLs so
     // that the server knows to send SSL-ified resource references.
-    if (url.compare(0, 5, "https") == 0)
-        result += "&secure";
+    result += "&secure";
 
     return result;
 }
diff --git a/test/miscellaneous/mapbox.cpp b/test/miscellaneous/mapbox.cpp
index 9496f2d27..a9c709fe9 100644
--- a/test/miscellaneous/mapbox.cpp
+++ b/test/miscellaneous/mapbox.cpp
@@ -7,8 +7,8 @@
 using namespace mbgl;
 
 TEST(Mapbox, SourceURL) {
-    EXPECT_EQ(mbgl::util::mapbox::normalizeSourceURL("mapbox://user.map", "key"), "https://api.tiles.mapbox.com/v4/user.map.json?access_token=key");
-    EXPECT_EQ(mbgl::util::mapbox::normalizeSourceURL("mapbox://user.map", "token"), "https://api.tiles.mapbox.com/v4/user.map.json?access_token=token");
+    EXPECT_EQ(mbgl::util::mapbox::normalizeSourceURL("mapbox://user.map", "key"), "https://api.tiles.mapbox.com/v4/user.map.json?access_token=key&secure");
+    EXPECT_EQ(mbgl::util::mapbox::normalizeSourceURL("mapbox://user.map", "token"), "https://api.tiles.mapbox.com/v4/user.map.json?access_token=token&secure");
     EXPECT_THROW(mbgl::util::mapbox::normalizeSourceURL("mapbox://user.map", ""), std::runtime_error);
 }