diff --git a/src/ol/render/canvas/canvasreplay.js b/src/ol/render/canvas/canvasreplay.js
index cd074638d7..6b02b76ad7 100644
--- a/src/ol/render/canvas/canvasreplay.js
+++ b/src/ol/render/canvas/canvasreplay.js
@@ -1,4 +1,5 @@
 // FIXME decide default snapToPixel behaviour
+// FIXME add option to apply snapToPixel to all coordinates?
 
 goog.provide('ol.render.canvas.BatchGroup');
 
diff --git a/src/ol/symbols.js b/src/ol/symbols.js
index d71d8a1df8..b548188352 100644
--- a/src/ol/symbols.js
+++ b/src/ol/symbols.js
@@ -1,3 +1,7 @@
+// FIXME check size when stroked
+// FIXME move to ol.render?
+// FIXME find a sensible caching strategy
+
 goog.provide('ol.symbol');
 
 goog.require('goog.dom');