diff --git a/src/ol/attribution.exports b/src/ol/attribution.exports
new file mode 100644
index 0000000000..053c0abeae
--- /dev/null
+++ b/src/ol/attribution.exports
@@ -0,0 +1 @@
+@exportSymbol ol.Attribution
diff --git a/src/ol/projection.exports b/src/ol/projection.exports
index 9dcb5c1ada..b10eb8e13c 100644
--- a/src/ol/projection.exports
+++ b/src/ol/projection.exports
@@ -1,4 +1,5 @@
 @exportSymbol ol.Projection
+@exportProperty ol.Projection.addProjection
 @exportProperty ol.Projection.getFromCode
 @exportProperty ol.Projection.getTransform
 @exportProperty ol.Projection.getTransformFromCodes
@@ -8,3 +9,6 @@
 @exportProperty ol.Projection.prototype.getExtent
 @exportProperty ol.Projection.prototype.getUnits
 
+@exportSymbol ol.ProjectionUnits
+@exportProperty ol.ProjectionUnits.DEGREES
+@exportProperty ol.ProjectionUnits.METERS
diff --git a/src/ol/projection.js b/src/ol/projection.js
index d64c2d68e0..44337c8718 100644
--- a/src/ol/projection.js
+++ b/src/ol/projection.js
@@ -1,4 +1,5 @@
 goog.provide('ol.Projection');
+goog.provide('ol.ProjectionUnits');
 
 goog.require('goog.array');
 goog.require('goog.asserts');