diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
index 3ca293a9468..d21ea426dd8 100644
--- a/src/PIL/BmpImagePlugin.py
+++ b/src/PIL/BmpImagePlugin.py
@@ -74,7 +74,8 @@ class BmpImageFile(ImageFile.ImageFile):
         'JPEG': 4,
         'PNG': 5
     }
-    RAW, RLE8, RLE4, BITFIELDS, JPEG, PNG = 0, 1, 2, 3, 4, 5
+    for k, v in COMPRESSIONS.items():
+        vars()[k] = v
 
     def _bitmap(self, header=0, offset=0):
         """ Read relevant info about the BMP """