diff --git a/compiler/optdead.pas b/compiler/optdead.pas
index 04e545771e..23c7a688fa 100644
--- a/compiler/optdead.pas
+++ b/compiler/optdead.pas
@@ -398,6 +398,11 @@ const
       else
         begin
           symbolprogfullpath:=symbolprogfullpath+' -p ';
+          { GNU nm shows 64 bit addresses when processing 32 bit binaries on
+            a 64 bit platform, but only skips 8 spaces for the address in case
+            of undefined symbols -> skip undefined symbols }
+          if target_info.system in (systems_linux+systems_windows) then
+            symbolprogfullpath:=symbolprogfullpath+'--defined-only ';
           symbolprogisnm:=true;
         end;
       if not symbolprogfound then