diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index 604a69e364..6725dcf4ba 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -786,7 +786,7 @@ void do_common_semihosting(CPUState *cs)
 
     case TARGET_SYS_ELAPSED:
         elapsed = get_clock() - clock_start;
-        if (sizeof(target_ulong) == 8) {
+        if (is_64bit_semihosting(env)) {
             if (SET_ARG(0, elapsed)) {
                 goto do_fault;
             }