diff --git a/dom/bindings/GenerateCSS2PropertiesWebIDL.py b/dom/bindings/GenerateCSS2PropertiesWebIDL.py
index 58ec60c29..57634494f 100644
--- a/dom/bindings/GenerateCSS2PropertiesWebIDL.py
+++ b/dom/bindings/GenerateCSS2PropertiesWebIDL.py
@@ -16,6 +16,7 @@ def generateLine(propName, extendedAttrs):
     return "  [%s] attribute DOMString %s;\n" % (", ".join(extendedAttrs),
                                                  propName)
 def generate(output, idlFilename, preprocessorHeader):
+    print(idlFilename)
     cpp = list(buildconfig.substs['CPP'])
     cpp += shellutil.split(buildconfig.substs['ACDEFINES'])
     cpp.append(preprocessorHeader)
diff --git a/dom/bindings/mozwebidlcodegen/__init__.py b/dom/bindings/mozwebidlcodegen/__init__.py
index b6e351e52..69f3f5e25 100644
--- a/dom/bindings/mozwebidlcodegen/__init__.py
+++ b/dom/bindings/mozwebidlcodegen/__init__.py
@@ -269,6 +269,7 @@ class WebIDLCodegenManager(LoggingMixin):
         # Generate bindings from .webidl files.
         for filename in sorted(changed_inputs):
             basename = mozpath.basename(filename)
+            print basename
             result.inputs.add(filename)
             written, deps = self._generate_build_files_for_webidl(filename)
             result.created |= written[0]