diff --git a/rtl/inc/system.inc b/rtl/inc/system.inc
index c4cf10ff98..c619a76527 100644
--- a/rtl/inc/system.inc
+++ b/rtl/inc/system.inc
@@ -953,7 +953,7 @@ begin
    exit;
   { check stack alignment }
 {$ifdef CPUI386}
-{$ifdef FPC_STACKALIGNMENT=16}
+{$if FPC_STACKALIGNMENT=16}
   if ((PtrUInt(Sptr)+4) mod 16)<>0 then
     begin
       StackError:=true;