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-rw-r--r--ports/ARMCM3/chcore.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ports/ARMCM3/chcore.c b/ports/ARMCM3/chcore.c
index c09de270c..4aa797c63 100644
--- a/ports/ARMCM3/chcore.c
+++ b/ports/ARMCM3/chcore.c
@@ -151,7 +151,9 @@ void PendSVVector(void) {
chSchReadyI(otp);
(currp = fifo_remove(&rlist.r_queue))->p_state = PRCURR;
/* set the round-robin time quantum */
+#ifdef CH_USE_ROUNDROBIN
rlist.r_preempt = CH_TIME_QUANTUM;
+#endif
#ifdef CH_USE_TRACE
chDbgTrace(otp, currp);
#endif