diff --git a/matlab/TCV/gdat_tcv.m b/matlab/TCV/gdat_tcv.m
index b0634d90cb85680eb1085e37f6f4d8afb80b5922..d3eead55e73bb2436374473a6775966585b17ba9 100644
--- a/matlab/TCV/gdat_tcv.m
+++ b/matlab/TCV/gdat_tcv.m
@@ -2476,7 +2476,7 @@ elseif strcmp(mapping_for_tcv.method,'switchcase')
         gdat_data.nbi.t=gdat_data.nbi.dim{1};
         gdat_data.nbi.x=[];
         gdat_data.nbi.data_fullpath=[nodenameeff];
-        gdat_data.nbi.label='P_{nbi}';
+        gdat_data.nbi.label='P_{nbi1}';
         gdat_data.nbi.help = nbh_data_tdi.help;
         nodenameeff2 = '\results::nbh:energy';
         gdat_data.nbi.data_fullpath=[nodenameeff ' *1e6 for W; and ' nodenameeff2 ' *1e3 for eV'];