diff --git a/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java b/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java
index 47b1621..93a222c 100644
--- a/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java
+++ b/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java
@@ -84,7 +84,7 @@
             }
         });
 
-        gameViewModel.getmaxLiveData().observe(this, new Observer<Integer>() {
+        gameViewModel.getMaxLiveData().observe(this, new Observer<Integer>() {
             @Override
             public void onChanged(Integer new_HintMax) {
                 hintMax = new_HintMax;