diff --git a/doc/logo/scikit_image_logo.py b/doc/logo/scikit_image_logo.py
index 014c5786..fef3a234 100644
--- a/doc/logo/scikit_image_logo.py
+++ b/doc/logo/scikit_image_logo.py
@@ -24,6 +24,12 @@ from skimage.filter import sobel
 
 import scipy_logo
 
+# Python2/3 compatibility
+PY2 = sys.version_info[0] == 2
+if PY2:
+    itervalues = lambda d: d.itervalues()
+else:
+    itervalues = lambda d: d.values()
 
 # Utility functions
 # =================
@@ -49,7 +55,7 @@ def prepare_axes(ax):
     plt.sca(ax)
     ax.xaxis.set_visible(False)
     ax.yaxis.set_visible(False)
-    for spine in ax.spines.itervalues():
+    for spine in itervalues(ax.spines):
         spine.set_visible(False)
 
 
diff --git a/skimage/io/_plugins/plugin.py b/skimage/io/_plugins/plugin.py
index 7c25fb4e..d8bb0a76 100644
--- a/skimage/io/_plugins/plugin.py
+++ b/skimage/io/_plugins/plugin.py
@@ -12,6 +12,14 @@ except ImportError:
 import os.path
 from glob import glob
 
+# Python2/3 compatibility
+import sys
+PY2 = sys.version_info[0] == 2
+if PY2:
+    itervalues = lambda d: d.itervalues()
+else:
+    itervalues = lambda d: d.values()
+
 plugin_store = None
 
 plugin_provides = {}
@@ -174,7 +182,7 @@ def available(loaded=False):
 
     """
     active_plugins = set()
-    for plugin_func in plugin_store.itervalues():
+    for plugin_func in itervalues(plugin_store):
         for plugin, func in plugin_func:
             active_plugins.add(plugin)