diff --git a/src/toolbox_scs/constants.py b/src/toolbox_scs/constants.py
index 54e42f4b224fbf2371a2f56aa518c3634d96bea6..6b793e8a2a5dd436549aefc3c086782b89e3e2f4 100644
--- a/src/toolbox_scs/constants.py
+++ b/src/toolbox_scs/constants.py
@@ -379,6 +379,11 @@ mnemonics = {
                      'key': 'data.image.pixels',
                      'dim': ['llc2_y', 'llc2_x']},),
 
+    # PI-MTE3 CCD camera
+    "MTE3": ({'source': 'SCS_CDIFFT_MTE3/CAM/CAMERA:daqOutput',
+              'key': 'data.image.pixels',
+              'dim': ['x', 'y']},),
+    
     # FastCCD, if in raw folder, raw images
     #          if in proc folder, dark substracted and relative gain corrected
     "fastccd": ({'source': 'SCS_CDIDET_FCCD2M/DAQ/FCCD:daqOutput',