diff --git a/WFC3/default.yaml b/WFC3/default.yaml
index e8ab9209..8de059c3 100644
--- a/WFC3/default.yaml
+++ b/WFC3/default.yaml
@@ -31,6 +31,7 @@ mode_yamls:
     - WFC3_UVIS_DET.yaml
 
 properties:
+  instrument: WFC3
   modes: [IR_channel]
   filter_name: F160W
   dit: 60
@@ -52,4 +53,4 @@ properties :
   spectral :
     wave_min : 0.8
     wave_mid : 1.3
-    wave_max : 1.8
\ No newline at end of file
+    wave_max : 1.8