diff --git a/inc/config.php b/inc/config.php
index 6824e71d..0347846c 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -87,6 +87,11 @@
 	// For resizing, max values
 	define('THUMB_WIDTH',	200, true);
 	define('THUMB_HEIGHT',	200, true);
+	
+	// Store image hash in the database for r9k-like boards implementation soon
+	// Function name for hashing
+	// sha1_file, md5_file, etc.
+	define('FILE_HASH',		'md5_file', true);
 
 	// Maximum image upload size in bytes
 	define('MAX_FILESIZE',	10*1024*1024, true); // 10MB
diff --git a/post.php b/post.php
index 56bddd5d..169a55e1 100644
--- a/post.php
+++ b/post.php
@@ -166,7 +166,8 @@
 				error(ERR_MAXSIZE);
 			}
 			
-			$post['filehash'] = md5_file($post['file']);
+			$hash_function = FILE_HASH;
+			$post['filehash'] = $hash_function($post['file']);
 			$post['filesize'] = filesize($post['file']);
 			
 			$image = createimage($post['extension'], $post['file']);