diff --git a/src/toolbox_scs/constants.py b/src/toolbox_scs/constants.py
index d9a4639f8d2603cca90c29e596b31a460cd888d2..a59636f9ecdb80687a4e009f4dcf983c9a974440 100644
--- a/src/toolbox_scs/constants.py
+++ b/src/toolbox_scs/constants.py
@@ -156,9 +156,9 @@ mnemonics = {
     "MAG_CHICANE_DELAY": ({'source': 'SA3_XTD4_CHICANE/DOOCS/SXR2CPP',
                            'key': 'XFEL_MAGNETS_CHICANE_SXR2CPP.dtFs.value',
                            'dim': None},),
-    "Pol": ({'source': 'SA3_XTD10_UND/DOOCS/PHOTON_ENERGY',
-             'key': 'actualPolarization.value',
-              'dim': None},),
+    "AppleX": ({'source': 'SA3_XTD10_UND/DOOCS/PHOTON_ENERGY',
+                'key': 'actualPolarization.value',
+                'dim': None},),
 
     # PES
     "PES_1Araw": ({'source': 'SA3_XTD10_PES/ADC/1:network',