diff --git a/bfg.c b/bfg.c
index 068804a..2ff9f9f 100644
--- a/bfg.c
+++ b/bfg.c
@@ -195,7 +195,7 @@ int accu(int value)
   int i = 0;
   for(int a=1; a<=value; ++a)
   {
-  	i+=a+1;
+  	i+=a;
   }
   return i;
 }