diff --git a/ci.sh b/ci.sh
index 8cfba8f5..3d5dec04 100755
--- a/ci.sh
+++ b/ci.sh
@@ -49,6 +49,7 @@ cargo batch  \
     --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabi --features nightly,stm32l476vg,defmt,exti,time-driver-any,unstable-traits \
     --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features nightly,stm32l072cz,defmt,exti,time-driver-any,unstable-traits \
     --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features nightly,stm32l151cb-a,defmt,exti,time-driver-any,unstable-traits \
+    --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7m-none-eabi --features nightly,stm32f398ve,defmt,exti,time-driver-any,unstable-traits \
     --- build --release --manifest-path docs/modules/ROOT/examples/basic/Cargo.toml --target thumbv7em-none-eabi \
     --- build --release --manifest-path examples/std/Cargo.toml --target x86_64-unknown-linux-gnu --out-dir out/examples/std \
     --- build --release --manifest-path examples/nrf/Cargo.toml --target thumbv7em-none-eabi --out-dir out/examples/nrf \
diff --git a/embassy-stm32/src/rcc/f3.rs b/embassy-stm32/src/rcc/f3.rs
index 82091531..ababc4f9 100644
--- a/embassy-stm32/src/rcc/f3.rs
+++ b/embassy-stm32/src/rcc/f3.rs
@@ -218,7 +218,7 @@ fn calc_pll(config: &Config, Hertz(sysclk): Hertz) -> (Hertz, PllConfig) {
                     ))] {
                     let (multiplier, divisor) = get_mul_div(sysclk, HSI);
                     (
-                        Hertz((hse / divisor) * multiplier),
+                        Hertz((HSI / divisor) * multiplier),
                         Pllsrc::HSI_DIV_PREDIV,
                         into_pll_mul(multiplier),
                         Some(into_pre_div(divisor)),