diff --git a/src/privateer/cpp/privateer-lib.cpp b/src/privateer/cpp/privateer-lib.cpp
index a77128fe..33f77344 100644
--- a/src/privateer/cpp/privateer-lib.cpp
+++ b/src/privateer/cpp/privateer-lib.cpp
@@ -2468,7 +2468,7 @@ void privateer::glycanbuilderplot::Plot::recursive_paint ( clipper::MGlycan mg,
     bool node_contains_issue_with_sugar = false;
     int branches = node.number_of_connections();
 
-    node_contains_issue_with_sugar = sugar_contains_issues(sugar);
+    node_contains_issue_with_sugar = sugar_contains_issues(sugar,mg);
 
 
     if ( sugname == "Glc" )
diff --git a/src/privateer/cpp/privateer-lib.h b/src/privateer/cpp/privateer-lib.h
index d754a507..bedd21c3 100644
--- a/src/privateer/cpp/privateer-lib.h
+++ b/src/privateer/cpp/privateer-lib.h
@@ -174,9 +174,12 @@ namespace privateer
             return err;
         };
 
-        inline const bool sugar_contains_issues ( clipper::MSugar sugar )
+        inline const bool sugar_contains_issues ( clipper::MSugar sugar, clipper::MGlycan glycan )
         {
-
+            if ( ( glycan.get_type() == "c-glycan" ) && (sugar.type().trim() == "MAN" ) && (sugar.conformation_name() == "1c4"))
+                {
+                    sugar.override_conformation_diag ( true );
+                }
             if ( sugar.ok_with_conformation() && sugar.ok_with_anomer() &&
                     sugar.ok_with_chirality() && sugar.ok_with_puckering() )
                 return false;
diff --git a/webapp/src/wasm/privateer.wasm b/webapp/src/wasm/privateer.wasm
index 72f444a7..be658303 100755
Binary files a/webapp/src/wasm/privateer.wasm and b/webapp/src/wasm/privateer.wasm differ