diff --git a/MagickWand/operation.c b/MagickWand/operation.c
index 690b17b..96c25c6 100644
--- a/MagickWand/operation.c
+++ b/MagickWand/operation.c
@@ -1790,7 +1790,7 @@
             CLIWandExceptArgBreak(OptionError,"UnrecognizedAlphaChannelOption",
               option,arg1);
           (void) SetImageAlphaChannel(_image,(AlphaChannelOption) parse,
-            exception);
+            _exception);
           break;
         }
       if (LocaleCompare("annotate",option+1) == 0)