diff --git a/compiler/nadd.pas b/compiler/nadd.pas
index 6dbc8b32fb..cd14a42ef0 100644
--- a/compiler/nadd.pas
+++ b/compiler/nadd.pas
@@ -1995,6 +1995,10 @@ implementation
           begin
             if not(nodetype in [equaln,unequaln]) then
               CGMessage3(type_e_operator_not_supported_for_types,node2opstr(nodetype),ld.typename,rd.typename);
+            if lt=niln then
+              inserttypeconv_explicit(left,right.resultdef)
+            else
+              inserttypeconv_explicit(right,left.resultdef)
           end
 
 {$ifdef SUPPORT_MMX}