diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index 9a0c7e0..f3434e2 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -41,7 +41,7 @@
 target_compile_definitions(psa_interface
     INTERFACE
         $<$<BOOL:${CONFIG_TFM_ENABLE_CTX_MGMT}>:CONFIG_TFM_ENABLE_CTX_MGMT>
-        $<$<BOOL:${TFM_ISOLATION_LEVEL}>:TFM_LVL=${TFM_ISOLATION_LEVEL}>
+        $<$<BOOL:${TFM_ISOLATION_LEVEL}>:TFM_ISOLATION_LEVEL=${TFM_ISOLATION_LEVEL}>
         $<$<BOOL:${CONFIG_TFM_USE_TRUSTZONE}>:CONFIG_TFM_USE_TRUSTZONE>
         $<$<BOOL:${TFM_MULTI_CORE_TOPOLOGY}>:TFM_MULTI_CORE_TOPOLOGY>
         $<$<BOOL:${CONFIG_TFM_PARTITION_META}>:CONFIG_TFM_PARTITION_META>
diff --git a/interface/include/config_impl.h.template b/interface/include/config_impl.h.template
index 4a172e3..ade895c 100644
--- a/interface/include/config_impl.h.template
+++ b/interface/include/config_impl.h.template
@@ -27,7 +27,7 @@
 
 #if CONFIG_TFM_SPM_BACKEND_IPC == 1
 /* Trustzone NS agent working stack size. */
-#if defined(TFM_FIH_PROFILE_ON) && TFM_LVL == 1
+#if defined(TFM_FIH_PROFILE_ON) && TFM_ISOLATION_LEVEL == 1
 #define {{"%-56s"|format("CONFIG_TFM_NS_AGENT_TZ_STACK_SIZE")}} 1256
 #else
 #define {{"%-56s"|format("CONFIG_TFM_NS_AGENT_TZ_STACK_SIZE")}} 1024