diff --git a/build.py b/build.py
index 6028de2761..56077ab14a 100755
--- a/build.py
+++ b/build.py
@@ -326,7 +326,7 @@ def examples_star_json(name, match):
             "jscomp_off": [
               "es5Strict"
             ],
-            "compilation_level": "ADVANCED_OPTIMIZATIONS",
+            "compilation_level": "ADVANCED",
             "output_wrapper": "// OpenLayers 3. See http://ol3.js.org/\n(function(){%output%})();",
             "use_types_for_optimization": True,
             "manage_closure_dependencies": True
diff --git a/buildcfg/examples-all.json b/buildcfg/examples-all.json
index b02dc3bc66..3e43d1227a 100644
--- a/buildcfg/examples-all.json
+++ b/buildcfg/examples-all.json
@@ -58,7 +58,7 @@
     "jscomp_off": [
       "es5Strict"
     ],
-    "compilation_level": "ADVANCED_OPTIMIZATIONS",
+    "compilation_level": "ADVANCED",
     "output_wrapper": "// OpenLayers 3. See http://ol3.js.org/\n(function(){%output%})();",
     "use_types_for_optimization": true,
     "manage_closure_dependencies": true
diff --git a/buildcfg/ol-all.json b/buildcfg/ol-all.json
index 2df2d9a430..549941a437 100644
--- a/buildcfg/ol-all.json
+++ b/buildcfg/ol-all.json
@@ -55,7 +55,7 @@
     "jscomp_off": [
       "es5Strict"
     ],
-    "compilation_level": "ADVANCED_OPTIMIZATIONS",
+    "compilation_level": "ADVANCED",
     "output_wrapper": "// OpenLayers 3. See http://ol3.js.org/\n(function(){%output%})();",
     "use_types_for_optimization": true
   }
diff --git a/buildcfg/ol-simple.json b/buildcfg/ol-simple.json
index 9ea2246179..17ee131547 100644
--- a/buildcfg/ol-simple.json
+++ b/buildcfg/ol-simple.json
@@ -55,7 +55,7 @@
     "jscomp_off": [
       "es5Strict"
     ],
-    "compilation_level": "SIMPLE_OPTIMIZATIONS",
+    "compilation_level": "SIMPLE",
     "output_wrapper": "%output%",
     "use_types_for_optimization": false,
     "manage_closure_dependencies": true
diff --git a/buildcfg/ol.json b/buildcfg/ol.json
index fb704efba2..fb9644e890 100644
--- a/buildcfg/ol.json
+++ b/buildcfg/ol.json
@@ -55,7 +55,7 @@
     "jscomp_off": [
       "es5Strict"
     ],
-    "compilation_level": "ADVANCED_OPTIMIZATIONS",
+    "compilation_level": "ADVANCED",
     "output_wrapper": "// OpenLayers 3. See http://ol3.js.org/\n(function(){%output%})();",
     "use_types_for_optimization": true,
     "manage_closure_dependencies": true