diff --git a/im/README.md b/im/README.md
index d660457..7e8c034 100644
--- a/im/README.md
+++ b/im/README.md
@@ -32,7 +32,7 @@ Default Options:
 
 `--patience 300` means the training of factorization machine stops without loss reduction after 300 epoch.
 
-`--target max` means to maximize the optimization target. For minimization, set `--target min`.
+`--target max` means to maximize the optimization target. For minimization, set `--target min` instead.
 
 `--num 300` means to output 300 optimized molecules.