diff --git a/.gitignore b/.gitignore
index 5295ff95f..c2ddb1a0c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 /ios/build
 /config.gypi
 /config.mk
+/config/constants_local.cpp
 /build
 /bin/node_modules
 /include/llmr/shader/shaders.hpp
diff --git a/src/util/constants.cpp b/config/constants.cpp
similarity index 76%
rename from src/util/constants.cpp
rename to config/constants.cpp
index 46852e5e7..ab0c160a8 100644
--- a/src/util/constants.cpp
+++ b/config/constants.cpp
@@ -1,5 +1,9 @@
 #include <llmr/util/constants.hpp>
 
+const char *llmr::kSpriteURL = "http://mapbox-kkaefer.s3.amazonaws.com/static/outdoors-gl/sprite";
+const char *llmr::kVectorTileURL = "http://a.tiles.mapbox.com/v3/mapbox.mapbox-terrain-v1,mapbox.mapbox-streets-v5/%d/%d/%d.vector.pbf";
+const char *llmr::kGlyphURL = "http://mapbox.s3.amazonaws.com/gl-glyphs-256/%s/%d-%d.pbf";
+
 const float llmr::util::tileSize = 512.0f;
 
 #if defined(DEBUG)
@@ -24,4 +28,4 @@ const bool llmr::debug::missingFontStackWarning = false;
 const bool llmr::debug::missingFontFaceWarning = false;
 const bool llmr::debug::glyphWarning = false;
 const bool llmr::debug::shapingWarning = false;
-#endif
\ No newline at end of file
+#endif
diff --git a/include/llmr/platform/platform.hpp b/include/llmr/platform/platform.hpp
index 31118a22f..220acd397 100644
--- a/include/llmr/platform/platform.hpp
+++ b/include/llmr/platform/platform.hpp
@@ -12,9 +12,6 @@ class loop;
 }
 
 namespace llmr {
-
-extern const char *kSpriteURL;
-
 namespace platform {
 
 class Request;
diff --git a/include/llmr/util/constants.hpp b/include/llmr/util/constants.hpp
index f315e5171..e3a7b206e 100644
--- a/include/llmr/util/constants.hpp
+++ b/include/llmr/util/constants.hpp
@@ -6,6 +6,11 @@
 #include "vec.hpp"
 
 namespace llmr {
+
+extern const char *kSpriteURL;
+extern const char *kVectorTileURL;
+extern const char *kGlyphURL;
+
 namespace util {
 
 extern const float tileSize;
diff --git a/llmr.gyp b/llmr.gyp
index d165a24d3..73aece077 100644
--- a/llmr.gyp
+++ b/llmr.gyp
@@ -65,6 +65,7 @@
       ],
       'sources': [
         '<!@(find src -name "*.cpp")',
+        '<!@(test -f "config/constants_local.cpp" && echo "config/constants_local.cpp" || echo "config/constants.cpp")',
         '<!@(find src -name "*.c")',
         '<!@(find src -name "*.h")',
         '<!@(find include -name "*.hpp")',
@@ -131,6 +132,7 @@
       ],
       'sources': [
         '<!@(find src/ \( -name "*.cpp" ! -name shaders.hpp ! -name shaders_gles2.cpp ! -name shaders_gl.cpp \))',
+        '<!@(test -f "config/constants_local.cpp" && echo "config/constants_local.cpp" || echo "config/constants.cpp")',
         '<!@(find src -name "*.c")',
         '<!@(find src -name "*.h")',
         '<!@(find include -name "*.hpp")',
diff --git a/src/map/map.cpp b/src/map/map.cpp
index af8876541..2a3f366f1 100644
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -170,7 +170,7 @@ void Map::setup() {
     sources.emplace("outdoors",
                     std::unique_ptr<Source>(new Source(*this,
                            painter,
-                           "http://a.tiles.mapbox.com/v3/mapbox.mapbox-terrain-v1,mapbox.mapbox-streets-v5/%d/%d/%d.vector.pbf",
+                           kVectorTileURL,
                            Source::Type::vector,
                            {{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 }},
                            512,
diff --git a/src/platform/platform.cpp b/src/platform/platform.cpp
deleted file mode 100644
index 6aa5ef38f..000000000
--- a/src/platform/platform.cpp
+++ /dev/null
@@ -1,3 +0,0 @@
-#include <llmr/platform/platform.hpp>
-
-const char *llmr::kSpriteURL = "http://mapbox-kkaefer.s3.amazonaws.com/static/outdoors-gl/sprite";
diff --git a/src/text/glyph_store.cpp b/src/text/glyph_store.cpp
index 50084ba5f..9d88a692b 100644
--- a/src/text/glyph_store.cpp
+++ b/src/text/glyph_store.cpp
@@ -4,6 +4,7 @@
 #include <llmr/util/string.hpp>
 #include <llmr/util/utf.hpp>
 #include <llmr/util/pbf.hpp>
+#include <llmr/util/constants.hpp>
 #include <llmr/platform/platform.hpp>
 #include <uv.h>
 #include <algorithm>
@@ -118,7 +119,7 @@ GlyphPBF::GlyphPBF(const std::string &fontStack, GlyphRange glyphRange)
     : future(promise.get_future().share())
 {
     // Load the glyph set URL
-    std::string url = util::sprintf<255>("http://mapbox.s3.amazonaws.com/gl-glyphs-256/%s/%d-%d.pbf", fontStack.c_str(), glyphRange.first, glyphRange.second);
+    std::string url = util::sprintf<255>(kGlyphURL, fontStack.c_str(), glyphRange.first, glyphRange.second);
 
     // TODO: Find more reliable URL normalization function
     std::replace(url.begin(), url.end(), ' ', '+');