diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
index 1041ab763..aba7d9e22 100644
--- a/src/PIL/BmpImagePlugin.py
+++ b/src/PIL/BmpImagePlugin.py
@@ -209,7 +209,10 @@ class BmpImageFile(ImageFile.ImageFile):
             else:
                 raise OSError("Unsupported BMP bitfields layout")
         elif file_info["compression"] == self.RAW:
-            if file_info["bits"] == 32 and header == 22:  # 32-bit .cur offset
+            try: self.is_cur
+            except: self.is_cur = False
+
+            if file_info["bits"] == 32 and self.is_cur:
                 raw_mode, self.mode = "BGRA", "RGBA"
         elif file_info["compression"] == self.RLE8:
             decoder_name = "bmp_rle"
diff --git a/src/PIL/CurImagePlugin.py b/src/PIL/CurImagePlugin.py
index 42af5cafc..e96e18d16 100644
--- a/src/PIL/CurImagePlugin.py
+++ b/src/PIL/CurImagePlugin.py
@@ -44,6 +44,7 @@ class CurImageFile(BmpImagePlugin.BmpImageFile):
         s = self.fp.read(6)
         if not _accept(s):
             raise SyntaxError("not a CUR file")
+        self.is_cur = True
 
         # pick the largest cursor in the file
         m = b""