diff --git a/tests/test/units/math/ttrig1.pp b/tests/test/units/math/ttrig1.pp
index b50d14a906..3f60c56a2a 100644
--- a/tests/test/units/math/ttrig1.pp
+++ b/tests/test/units/math/ttrig1.pp
@@ -7,7 +7,7 @@ uses
   SysUtils,Math;
 
 const
-{$if defined(cpuarm) or defined (cpumips)}
+{$if defined(cpuarm) or defined (cpumips) or defined(cpuaarch64)}
   arctan_res = 1E-13;
 {$else}
   arctan_res = 1E-14;