diff --git a/binding-mruby/binding-mruby.cpp b/binding-mruby/binding-mruby.cpp
index edfee4f..1ccbf6e 100644
--- a/binding-mruby/binding-mruby.cpp
+++ b/binding-mruby/binding-mruby.cpp
@@ -159,7 +159,7 @@ showExcMessageBox(mrb_state *mrb, mrb_value exc)
 	const char *excClass = mrb_class_name(mrb, mrb_class(mrb, exc));
 
 	char msgBoxText[512];
-	snprintf(msgBoxText, 512, "Script '%s' line %d: %s occured.\n\n%s",
+	snprintf(msgBoxText, sizeof(msgBoxText), "Script '%s' line %d: %s occured.\n\n%s",
 	         mrbValueString(file), mrb_fixnum(line), excClass, mrbValueString(mesg));
 
 	shState->eThread().showMessageBox(msgBoxText, SDL_MESSAGEBOX_ERROR);
diff --git a/binding-mruby/binding-util.h b/binding-mruby/binding-util.h
index cabb775..c6cefae 100644
--- a/binding-mruby/binding-util.h
+++ b/binding-mruby/binding-util.h
@@ -235,10 +235,10 @@ getMrbData(mrb_state *mrb)
 static inline mrb_value
 mrb__float_value(mrb_float f)
 {
-  mrb_value v;
+	mrb_value v;
 
-  MRB_SET_VALUE(v, MRB_TT_FLOAT, value.f, f);
-  return v;
+	MRB_SET_VALUE(v, MRB_TT_FLOAT, value.f, f);
+	return v;
 }
 
 inline mrb_sym
@@ -252,7 +252,7 @@ inline T *
 getPrivateData(mrb_state *mrb, mrb_value self)
 {
 	mrb_value priv = mrb_obj_iv_get(mrb,
-									mrb_obj_ptr(self),
+	                                mrb_obj_ptr(self),
 	                                getSym(mrb, CSpriv_iv));
 
 	return static_cast<T*>(DATA_PTR(priv));
@@ -287,15 +287,15 @@ inline void
 setPrivateData(mrb_state *mrb, mrb_value self, void *p, const mrb_data_type &type)
 {
 	RData *data =
-			mrb_data_object_alloc(mrb,
-								  mrb_obj_class(mrb, self),
-								  p,
-								  &type);
+		mrb_data_object_alloc(mrb,
+		                      mrb_obj_class(mrb, self),
+		                      p,
+		                      &type);
 
 	mrb_obj_iv_set(mrb,
-				   mrb_obj_ptr(self),
+	               mrb_obj_ptr(self),
 	               getSym(mrb, CSpriv_iv),
-				   mrb_obj_value(data));
+	               mrb_obj_value(data));
 }
 
 
@@ -320,7 +320,7 @@ wrapProperty(mrb_state *mrb, mrb_value self,
 	mrb_obj_iv_set(mrb,
 	               mrb_obj_ptr(self),
 	               getSym(mrb, iv),
-		           propObj);
+	               propObj);
 }
 
 inline void