diff --git a/compiler/systems/t_wasi.pas b/compiler/systems/t_wasi.pas
index 1d389c7f75..2ea216d186 100644
--- a/compiler/systems/t_wasi.pas
+++ b/compiler/systems/t_wasi.pas
@@ -378,6 +378,7 @@ end;
 function TInternalLinkerWasi.GetBssSize(aExeOutput: TExeOutput): QWord;
 begin
   Result:=GetExeSectionSize(aExeOutput,'.bss') +
+          GetExeSectionSize(aExeOutput,'.tbss') +
           GetExeSectionSize(aExeOutput,'fpc.reshandles');
 end;