diff --git a/duoqin/AndroidProducts.mk b/duoqin/AndroidProducts.mk
index 1ae86e6..548bf84 100644
--- a/duoqin/AndroidProducts.mk
+++ b/duoqin/AndroidProducts.mk
@@ -1,3 +1,3 @@
 PRODUCT_MAKEFILES := \
-    $(LOCAL_DIR)/duoqin-f21pro.mk \
-    $(LOCAL_DIR)/duoqin-f22pro.mk
+    $(LOCAL_DIR)/duoqin_f21pro.mk \
+    $(LOCAL_DIR)/duoqin_f22pro.mk
diff --git a/duoqin/duoqin-f21pro.mk b/duoqin/duoqin_f21pro.mk
similarity index 100%
rename from duoqin/duoqin-f21pro.mk
rename to duoqin/duoqin_f21pro.mk
diff --git a/duoqin/duoqin-f22pro.mk b/duoqin/duoqin_f22pro.mk
similarity index 100%
rename from duoqin/duoqin-f22pro.mk
rename to duoqin/duoqin_f22pro.mk