diff --git a/msa/server.R b/msa/server.R
index a401d5f..8f90082 100644
--- a/msa/server.R
+++ b/msa/server.R
@@ -67,11 +67,11 @@ function(input, output, session) {
         LogoPlotMSA(target=target,
                     plot_positions=full_range_min:full_range_max,
                     my_logo_col = logoplot_colour_scheme,
-                    aa_pos_drug = paste0(target,"_aa_pos_drug"),
-                    active_aa_pos = paste0(target,"_active_aa_pos"),
-                    aa_pos_lig1 = paste0(target,"_aa_pos_lig1"),
-                    aa_pos_lig2 = paste0(target,"_aa_pos_lig2"),
-                    aa_pos_lig3 = paste0(target,"_aa_pos_lig3")
+                    aa_pos_drug = get(paste0(target,"_aa_pos_drug")),
+                    active_aa_pos = get(paste0(target,"_active_aa_pos")),
+                    aa_pos_lig1 = get(paste0(target,"_aa_pos_lig1")),
+                    aa_pos_lig2 = get(paste0(target,"_aa_pos_lig2")),
+                    aa_pos_lig3 = get(paste0(target,"_aa_pos_lig3"))
         )
       )
     }