diff --git a/imagemagick.module b/imagemagick.module
index c42f3b4..c7ad0b8 100644
--- a/imagemagick.module
+++ b/imagemagick.module
@@ -372,6 +372,15 @@ function _imagemagick_convert($source, $dest, $args) {
   );
   drupal_alter('imagemagick_arguments', $args, $context);
 
+  // If an argument ends with a colon ':', assume it is a the format the
+  // resulting image should be saved in.
+  foreach ($args as $operation) {
+    if (strrpos($operation, ':') == strlen($operation) - 1) {
+      $dest = $operation . $dest;
+      $args = array_diff($args, array($operation));
+    }
+  }
+
   // To make use of ImageMagick 6's parenthetical command grouping we need to make
   // the $source image the first parameter and $dest the last.
   // @see http://www.imagemagick.org/Usage/basics/#cmdline