diff --git a/zephyr/CMakeLists.txt b/zephyr/CMakeLists.txt
index 586d06734..cb9bb5c64 100644
--- a/zephyr/CMakeLists.txt
+++ b/zephyr/CMakeLists.txt
@@ -110,6 +110,7 @@ if(CONFIG_WOLFSSL)
     zephyr_library_sources(${ZEPHYR_CURRENT_MODULE_DIR}/wolfcrypt/src/port/psa/psa_aes.c)
     zephyr_library_sources(${ZEPHYR_CURRENT_MODULE_DIR}/wolfcrypt/src/port/psa/psa_hash.c)
     zephyr_library_sources(${ZEPHYR_CURRENT_MODULE_DIR}/wolfcrypt/src/port/psa/psa_pkcbs.c)
+    zephyr_library_sources(${ZEPHYR_CURRENT_MODULE_DIR}/wolfcrypt/src/port/st/stm32.c)
   
     zephyr_library_link_libraries(wolfSSL)