diff --git a/include/evm.h b/include/evm.h
index 491f2d1..719ad4c 100644
--- a/include/evm.h
+++ b/include/evm.h
@@ -59,6 +59,10 @@ enum evm_call_kind {
 	EVM_CREATE = 3        ///< Request CREATE. Semantic of some params changes.
 };
 
+enum evm_flags {
+	EVM_STATIC = 1
+};
+
 struct evm_message {
     struct evm_uint160be address;
     struct evm_uint160be sender;
@@ -69,6 +73,7 @@ struct evm_message {
     int64_t gas;
     int32_t depth;
     enum evm_call_kind kind;
+    uint32_t flags;
 };
 
 struct evm_tx_context {
@@ -423,6 +428,7 @@ enum evm_code_status {
 typedef enum evm_code_status
 (*evm_get_code_status_fn)(struct evm_instance* instance,
                           enum evm_mode mode,
+                          uint32_t flags,
                           struct evm_uint256be code_hash);
 
 /// Request preparation of the code for faster execution. It is not required
@@ -430,6 +436,7 @@ typedef enum evm_code_status
 /// JIT-like VMs.
 typedef void (*evm_prepare_code_fn)(struct evm_instance* instance,
                                     enum evm_mode mode,
+                                    uint32_t flags,
                                     struct evm_uint256be code_hash,
                                     uint8_t const* code,
                                     size_t code_size);