diff --git a/rtl/linux/sparc64/si_prc.inc b/rtl/linux/sparc64/si_prc.inc
index 0f8dbc1418..9f93499e44 100644
--- a/rtl/linux/sparc64/si_prc.inc
+++ b/rtl/linux/sparc64/si_prc.inc
@@ -38,7 +38,7 @@ procedure _FPC_proc_start; assembler; nostackframe; public name '_start';
     sethi	%hi(operatingsystem_parameter_argc),%o1
     or	%o1,%lo(operatingsystem_parameter_argc),%o1
 {$endif FPC_PIC}
-    stx	%o2, [%o1]
+    st	%o2, [%o1]
     { extract argv }
 {$ifdef FPC_PIC}
 {$else FPC_PIC}