diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01253318d..861f1f62c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- S3: Allow powering down RC_FAST_CLK (#796)
+
 ### Removed
 
 - `Pin::is_pcore_interrupt_set` (#793)
diff --git a/esp-hal-common/src/rtc_cntl/rtc/esp32s3_sleep.rs b/esp-hal-common/src/rtc_cntl/rtc/esp32s3_sleep.rs
index 55fe68209..a9c7ffe02 100644
--- a/esp-hal-common/src/rtc_cntl/rtc/esp32s3_sleep.rs
+++ b/esp-hal-common/src/rtc_cntl/rtc/esp32s3_sleep.rs
@@ -844,7 +844,7 @@ impl RtcSleepConfig {
 
             #[rustfmt::skip]
             rtc_cntl.clk_conf.modify(|_, w| w
-                .ck8m_force_pu().bit(self.int_8m_pd_en())
+                .ck8m_force_pu().bit(!self.int_8m_pd_en())
             );
 
             // enable VDDSDIO control by state machine