diff --git a/arm-semi.c b/arm-semi.c
index 1cf22038872b7219cb5b306074a6885c5148d2fc..cd77d1da0f0ad11e50cf47627b73489765f55cd3 100644
--- a/arm-semi.c
+++ b/arm-semi.c
@@ -362,6 +362,7 @@ uint32_t do_arm_semihosting(CPUState *env)
                 return (uint32_t)-1;
             ret = set_swi_errno(ts, system(s));
             unlock_user(s, ARG(0), 0);
+            return ret;
         }
     case SYS_ERRNO:
 #ifdef CONFIG_USER_ONLY