diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
index c33928a..cd1eaf2 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
@@ -12,8 +12,11 @@
 import retrofit2.http.Field;
 import retrofit2.http.FormUrlEncoded;
 import retrofit2.http.GET;
+import retrofit2.http.HTTP;
+import retrofit2.http.Headers;
 import retrofit2.http.POST;
 import retrofit2.http.Path;
+import retrofit2.http.Query;
 
 //-----------------------------------------------------------------
 // RestAPI: /gallery/{aid}/pageMap/{pid}/layers/{layerNo}/
@@ -46,7 +49,7 @@
     //-----------------------------------------------------------------
     //
     @DELETE("gallery/{aid}/pageMap/0/layers/0/strokes")
-    Call<String> deleteStrokes(@Path("aid") Integer aid, @Field("uid") Integer uid);
+    Call<String> deleteStrokes(@Path("aid") Integer aid, @Query("uid") Integer uid);
 
     //-----------------------------------------------------------------
     //