diff --git a/mapbox-gl-js b/mapbox-gl-js
index 69bb05cef..28e9725bd 160000
--- a/mapbox-gl-js
+++ b/mapbox-gl-js
@@ -1 +1 @@
-Subproject commit 69bb05cef27c99722f6616867032d64b5f12ee57
+Subproject commit 28e9725bd5d18cc623435292a408df6fbefa1da9
diff --git a/src/mbgl/shaders/symbol_sdf.cpp b/src/mbgl/shaders/symbol_sdf.cpp
index 76399dbb5..e0ee57b6d 100644
--- a/src/mbgl/shaders/symbol_sdf.cpp
+++ b/src/mbgl/shaders/symbol_sdf.cpp
@@ -142,7 +142,7 @@ void main() {
     
 
     lowp vec4 color = fill_color;
-    lowp float gamma = EDGE_GAMMA / u_gamma_scale;
+    highp float gamma = EDGE_GAMMA / u_gamma_scale;
     lowp float buff = (256.0 - 64.0) / 256.0;
     if (u_is_halo) {
         color = halo_color;