diff --git a/arch/risc-v/src/common/riscv_idle.c b/arch/risc-v/src/common/riscv_idle.c
index 5e33578290..96819e363b 100644
--- a/arch/risc-v/src/common/riscv_idle.c
+++ b/arch/risc-v/src/common/riscv_idle.c
@@ -53,4 +53,13 @@ void up_idle(void)
    */
 
   nxsched_process_timer();
+#else
+
+  /* This would be an appropriate place to put some MCU-specific logic to
+   * sleep in a reduced power mode until an interrupt occurs to save power
+   */
+
+  asm("WFI");
+
+#endif
 }