diff --git a/duoqin/duoqin_f21pro.mk b/duoqin/duoqin_f21pro.mk
index db7b664..3fbc385 100644
--- a/duoqin/duoqin_f21pro.mk
+++ b/duoqin/duoqin_f21pro.mk
@@ -49,12 +49,12 @@ PRODUCT_PACKAGES += \
 	Davx5 \
 	DeskClock \
 	Etar \
+	ExactCalculator \
 	FDroid \
 	Gallery2 \
 	Linphone \
 	Nextcloud \
 	NextcloudNotes \
-	OpenCalc \
 	Wireguard
 
 PRODUCT_PACKAGES -= \