diff --git a/IPython/html/widgets/__init__.py b/IPython/html/widgets/__init__.py
index d62a3d2..f72c67d 100644
--- a/IPython/html/widgets/__init__.py
+++ b/IPython/html/widgets/__init__.py
@@ -22,3 +22,8 @@ from .widget_int import IntTextWidget, BoundedIntTextWidget, IntSliderWidget, In
 from .widget_selection import RadioButtonsWidget, ToggleButtonsWidget, DropdownWidget, SelectWidget
 from .widget_selectioncontainer import TabWidget, AccordionWidget
 from .widget_string import HTMLWidget, LatexWidget, TextWidget, TextareaWidget
+
+# Warn on import
+from IPython.utils.warn import warn
+warn("""The widget API is still considered experimental and 
+    may change by the next major release of IPython.""")