diff --git a/app/boards/native_sim_libfuzzer.conf b/app/boards/native_sim_libfuzzer.conf
index 4aa87bef34fe..ad869e58a3c3 100644
--- a/app/boards/native_sim_libfuzzer.conf
+++ b/app/boards/native_sim_libfuzzer.conf
@@ -9,3 +9,9 @@ CONFIG_ZEPHYR_NATIVE_DRIVERS=y
 CONFIG_ARCH_POSIX_LIBFUZZER=y
 CONFIG_ZEPHYR_POSIX_FUZZ_TICKS=100
 CONFIG_ASAN=y
+
+# Override incompatible options found in sof/app/prj.conf
+# to silence build time warnings
+# (strange why these are in app/prj.conf but not our problem here)
+CONFIG_SMP_BOOT_DELAY=n
+CONFIG_SCHED_CPU_MASK_PIN_ONLY=n