diff --git a/platform/default/mbgl/storage/offline_schema.cpp.include b/platform/default/mbgl/storage/offline_schema.cpp.include
index b02f2dffa23..3068dadfe08 100644
--- a/platform/default/mbgl/storage/offline_schema.cpp.include
+++ b/platform/default/mbgl/storage/offline_schema.cpp.include
@@ -15,7 +15,7 @@ static const char * schema =
 "CREATE TABLE tiles (\n"
 "  id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,\n"
 "  url_template TEXT NOT NULL,\n"
-"  pixel_ratio INTEGER,\n"
+"  pixel_ratio INTEGER NOT NULL,\n"
 "  z INTEGER NOT NULL,\n"
 "  x INTEGER NOT NULL,\n"
 "  y INTEGER NOT NULL,\n"
diff --git a/platform/default/mbgl/storage/offline_schema.sql b/platform/default/mbgl/storage/offline_schema.sql
index 409a70ca6d4..cba922f3f75 100644
--- a/platform/default/mbgl/storage/offline_schema.sql
+++ b/platform/default/mbgl/storage/offline_schema.sql
@@ -13,8 +13,8 @@ CREATE TABLE resources (                   -- Generic table for style, source, s
 
 CREATE TABLE tiles (
   id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
-  url_template TEXT NOT NULL,           -- As it would appear in TileJSON (but no support for host sharding).
-  pixel_ratio INTEGER,                  -- If NULL, 1 is assumed for raster sources.
+  url_template TEXT NOT NULL,
+  pixel_ratio INTEGER NOT NULL,
   z INTEGER NOT NULL,
   x INTEGER NOT NULL,
   y INTEGER NOT NULL,
diff --git a/src/mbgl/storage/resource.cpp b/src/mbgl/storage/resource.cpp
index 6f727a60278..d5b88d92921 100644
--- a/src/mbgl/storage/resource.cpp
+++ b/src/mbgl/storage/resource.cpp
@@ -49,6 +49,7 @@ Resource Resource::glyphs(const std::string& urlTemplate, const std::string& fon
 }
 
 Resource Resource::tile(const std::string& urlTemplate, float pixelRatio, int32_t x, int32_t y, int8_t z) {
+    bool supportsRatio = urlTemplate.find("{ratio}") != std::string::npos;
     return Resource {
         Resource::Kind::Tile,
         util::replaceTokens(urlTemplate, [&](const std::string& token) {
@@ -71,7 +72,7 @@ Resource Resource::tile(const std::string& urlTemplate, float pixelRatio, int32_
         }),
         Resource::TileData {
             urlTemplate,
-            uint8_t(pixelRatio > 1.0 ? 2 : 1),
+            uint8_t(supportsRatio && pixelRatio > 1.0 ? 2 : 1),
             x,
             y,
             z
diff --git a/test/storage/resource.cpp b/test/storage/resource.cpp
index 30c1597df2c..0b04c1b3e45 100644
--- a/test/storage/resource.cpp
+++ b/test/storage/resource.cpp
@@ -18,14 +18,24 @@ TEST(Resource, Source) {
 
 TEST(Resource, Tile) {
     using namespace mbgl;
-    Resource resource = Resource::tile("http://example.com/{z}/{x}/{y}{ratio}.png", 2.0, 1, 2, 3);
-    EXPECT_EQ(Resource::Kind::Tile, resource.kind);
-    EXPECT_EQ("http://example.com/3/1/2@2x.png", resource.url);
-    EXPECT_EQ("http://example.com/{z}/{x}/{y}{ratio}.png", resource.tileData->urlTemplate);
-    EXPECT_EQ(2.0, resource.tileData->pixelRatio);
-    EXPECT_EQ(1, resource.tileData->x);
-    EXPECT_EQ(2, resource.tileData->y);
-    EXPECT_EQ(3, resource.tileData->z);
+
+    Resource rasterTile = Resource::tile("http://example.com/{z}/{x}/{y}{ratio}.png", 2.0, 1, 2, 3);
+    EXPECT_EQ(Resource::Kind::Tile, rasterTile.kind);
+    EXPECT_EQ("http://example.com/3/1/2@2x.png", rasterTile.url);
+    EXPECT_EQ("http://example.com/{z}/{x}/{y}{ratio}.png", rasterTile.tileData->urlTemplate);
+    EXPECT_EQ(2, rasterTile.tileData->pixelRatio);
+    EXPECT_EQ(1, rasterTile.tileData->x);
+    EXPECT_EQ(2, rasterTile.tileData->y);
+    EXPECT_EQ(3, rasterTile.tileData->z);
+
+    Resource vectorTile = Resource::tile("http://example.com/{z}/{x}/{y}.mvt", 2.0, 1, 2, 3);
+    EXPECT_EQ(Resource::Kind::Tile, vectorTile.kind);
+    EXPECT_EQ("http://example.com/3/1/2.mvt", vectorTile.url);
+    EXPECT_EQ("http://example.com/{z}/{x}/{y}.mvt", vectorTile.tileData->urlTemplate);
+    EXPECT_EQ(1, vectorTile.tileData->pixelRatio);
+    EXPECT_EQ(1, vectorTile.tileData->x);
+    EXPECT_EQ(2, vectorTile.tileData->y);
+    EXPECT_EQ(3, vectorTile.tileData->z);
 }
 
 TEST(Resource, Glyphs) {