diff --git a/PIL/Image.py b/PIL/Image.py
index a582aef38..ec3214d5c 100644
--- a/PIL/Image.py
+++ b/PIL/Image.py
@@ -538,15 +538,14 @@ class Image:
 
         return b"".join(data)
 
-    if bytes is str:
-        # Declare tostring as alias to tobytes
-        def tostring(self, *args, **kw):
-            warnings.warn(
-                'tostring() is deprecated. Please call tobytes() instead.',
-                DeprecationWarning,
-                stacklevel=2,
-            )
-            return self.tobytes(*args, **kw)
+    # Declare tostring as alias to tobytes
+    def tostring(self, *args, **kw):
+        warnings.warn(
+            'tostring() is deprecated. Please call tobytes() instead.',
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return self.tobytes(*args, **kw)
 
     ##
     # Returns the image converted to an X11 bitmap.  This method
@@ -595,11 +594,10 @@ class Image:
         if s[1] != 0:
             raise ValueError("cannot decode image data")
 
-    if bytes is str:
-        # Declare fromstring as alias to frombytes
-        def fromstring(self, *args, **kw):
-            warnings.warn('fromstring() is deprecated. Please call frombytes() instead.', DeprecationWarning)
-            return self.frombytes(*args, **kw)
+    def fromstring(self, *args, **kw):
+        """ Deprecated alias to frombytes """
+        warnings.warn('fromstring() is deprecated. Please call frombytes() instead.', DeprecationWarning)
+        return self.frombytes(*args, **kw)
 
     ##
     # Allocates storage for the image and loads the pixel data.  In
@@ -1814,15 +1812,14 @@ def frombytes(mode, size, data, decoder_name="raw", *args):
     im.frombytes(data, decoder_name, args)
     return im
 
-if bytes is str:
-    # Declare fromstring as an alias for frombytes
-    def fromstring(*args, **kw):
-        warnings.warn(
-            'fromstring() is deprecated. Please call frombytes() instead.',
-            DeprecationWarning,
-            stacklevel=2
-        )
-        return frombytes(*args, **kw)
+def fromstring(*args, **kw):
+    " Deprecated alias to frombytes "
+    warnings.warn(
+        'fromstring() is deprecated. Please call frombytes() instead.',
+        DeprecationWarning,
+        stacklevel=2
+    )
+    return frombytes(*args, **kw)
 
 ##
 # (New in 1.1.4) Creates an image memory referencing pixel data in a
diff --git a/PIL/ImagePalette.py b/PIL/ImagePalette.py
index 689910521..15b48c1d2 100644
--- a/PIL/ImagePalette.py
+++ b/PIL/ImagePalette.py
@@ -49,9 +49,8 @@ class ImagePalette:
             return self.palette
         return array.array("B", self.palette).tostring()
 
-    if bytes is str:
-        # Declare tostring as an alias for tobytes
-        tostring = tobytes
+    # Declare tostring as an alias for tobytes
+    tostring = tobytes
 
     def getcolor(self, color):
         # experimental: given an rgb tuple, allocate palette entry
diff --git a/PIL/ImageWin.py b/PIL/ImageWin.py
index 3d342b409..5961320b5 100644
--- a/PIL/ImageWin.py
+++ b/PIL/ImageWin.py
@@ -17,6 +17,7 @@
 # See the README file for information on usage and redistribution.
 #
 
+import warnings
 from . import Image
 
 ##
@@ -167,9 +168,24 @@ class Dib:
     def tobytes(self):
         return self.image.tobytes()
 
-    if bytes is str:
-        tostring = tobytes
-        fromstring = frombytes
+    ##
+    # Deprecated aliases to frombytes & tobytes.
+
+    def fromstring(self, *args, **kw):
+        warnings.warn(
+            'fromstring() is deprecated. Please call frombytes() instead.',
+            DeprecationWarning,
+            stacklevel=2
+        )
+        return self.frombytes(*args, **kw)
+
+    def tostring(self):
+        warnings.warn(
+            'tostring() is deprecated. Please call tobytes() instead.',
+            DeprecationWarning,
+            stacklevel=2
+        )
+        return self.tobytes()
 
 ##
 # Create a Window with the given title size.
diff --git a/_imagingcms.c b/_imagingcms.c
index 946b8c691..74f30aec0 100644
--- a/_imagingcms.c
+++ b/_imagingcms.c
@@ -497,9 +497,7 @@ static PyMethodDef pyCMSdll_methods[] = {
 
     {"profile_open", cms_profile_open, 1},
     {"profile_frombytes", cms_profile_fromstring, 1},
-#if PY_VERSION_HEX < 0x03000000
     {"profile_fromstring", cms_profile_fromstring, 1},
-#endif
 
     /* profile and transform functions */
     {"buildTransform", buildTransform, 1},
diff --git a/display.c b/display.c
index bf00e49fe..8ddb34e4e 100644
--- a/display.c
+++ b/display.c
@@ -224,10 +224,8 @@ static struct PyMethodDef methods[] = {
     {"releasedc", (PyCFunction)_releasedc, 1},
     {"frombytes", (PyCFunction)_frombytes, 1},
     {"tobytes", (PyCFunction)_tobytes, 1},
-#if PY_VERSION_HEX < 0x03000000
     {"fromstring", (PyCFunction)_frombytes, 1},
     {"tostring", (PyCFunction)_tobytes, 1},
-#endif
     {NULL, NULL} /* sentinel */
 };