diff --git a/compiler/pdecsub.pas b/compiler/pdecsub.pas
index ff772457ef..122994b9da 100644
--- a/compiler/pdecsub.pas
+++ b/compiler/pdecsub.pas
@@ -1728,7 +1728,7 @@ const
       idtok:_INTERRUPT;
       pd_flags : [pd_implemen,pd_body,pd_notobject,pd_notobjintf];
       handler  : @pd_interrupt;
-      pocall   : pocall_none;
+      pocall   : pocall_oldfpccall;
       pooption : [po_interrupt];
       mutexclpocall : [pocall_internproc,pocall_cdecl,pocall_cppdecl,pocall_stdcall,
                        pocall_pascal,pocall_far16,pocall_oldfpccall];