diff --git a/PIL/Jpeg2KImagePlugin.py b/PIL/Jpeg2KImagePlugin.py
index f57f4a784..128248512 100644
--- a/PIL/Jpeg2KImagePlugin.py
+++ b/PIL/Jpeg2KImagePlugin.py
@@ -45,7 +45,7 @@ def _parse_codestream(fp):
     elif csiz == 3:
         mode = 'RGB'
     elif csiz == 4:
-        mode == 'RGBA'
+        mode = 'RGBA'
     else:
         mode = None
     
@@ -122,7 +122,7 @@ def _parse_jp2_header(fp):
                     if nc == 3:
                         mode = 'RGB'
                     elif nc == 4:
-                        mode == 'RGBA'
+                        mode = 'RGBA'
                     break
 
     return (size, mode)