diff --git a/kivy/core/window/window_pygame.py b/kivy/core/window/window_pygame.py
index ca37ea5d2..ca316c3bf 100644
--- a/kivy/core/window/window_pygame.py
+++ b/kivy/core/window/window_pygame.py
@@ -243,7 +243,8 @@ class WindowPygame(WindowBase):
         if filename is None:
             return None
         if glReadPixels is None:
-            from kivy.core.gl import glReadPixels, GL_RGBA, GL_UNSIGNED_BYTE
+            from kivy.graphics.opengl import (glReadPixels, GL_RGBA,
+                                              GL_UNSIGNED_BYTE)
         width, height = self.system_size
         data = glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE)
         data = str(buffer(data))
diff --git a/kivy/core/window/window_sdl.py b/kivy/core/window/window_sdl.py
index ba311a182..db7a8c311 100644
--- a/kivy/core/window/window_sdl.py
+++ b/kivy/core/window/window_sdl.py
@@ -99,7 +99,7 @@ class WindowSDL(WindowBase):
         filename = super(WindowPygame, self).screenshot(*largs, **kwargs)
         if filename is None:
             return None
-        from kivy.core.gl import glReadPixels, GL_RGB, GL_UNSIGNED_BYTE
+        from kivy.graphics.opengl import glReadPixels, GL_RGB, GL_UNSIGNED_BYTE
         width, height = self.size
         data = glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE)
         data = str(buffer(data))