diff --git a/lispBM/c_libs/lbm_if.h b/lispBM/c_libs/lbm_if.h
index b7830249..03b71b4a 100755
--- a/lispBM/c_libs/lbm_if.h
+++ b/lispBM/c_libs/lbm_if.h
@@ -27,6 +27,7 @@
 
 typedef uint32_t lbm_value;
 typedef uint32_t lbm_type;
+typedef uint32_t lbm_cid;
 
 typedef uint32_t lbm_uint;
 typedef int32_t  lbm_int;
diff --git a/lispBM/c_libs/vesc_c_if.h b/lispBM/c_libs/vesc_c_if.h
index 6c6dd5db..4a1bf402 100755
--- a/lispBM/c_libs/vesc_c_if.h
+++ b/lispBM/c_libs/vesc_c_if.h
@@ -279,6 +279,14 @@ typedef struct {
 	bool (*uart_start)(uint32_t baudrate, bool half_duplex);
 	bool (*uart_write)(uint8_t *data, uint32_t size);
 	int32_t (*uart_read)(void);
+
+	// LBM
+	char* (*lbm_dec_str)(lbm_value);
+	int (*lbm_add_symbol_const)(char *, lbm_uint *);
+	void (*lbm_block_ctx_from_extension)(void);
+	bool (*lbm_unblock_ctx)(lbm_cid, lbm_value);
+	lbm_cid (*lbm_get_current_cid)(void);
+
 } vesc_c_if;
 
 typedef struct {
diff --git a/lispBM/lispif_c_lib.c b/lispBM/lispif_c_lib.c
index 5f398b65..68806a60 100644
--- a/lispBM/lispif_c_lib.c
+++ b/lispBM/lispif_c_lib.c
@@ -486,6 +486,13 @@ lbm_value ext_load_native_lib(lbm_value *args, lbm_uint argn) {
 		cif.cif.uart_write = lib_uart_write;
 		cif.cif.uart_read = lib_uart_read;
 
+		//LBM
+		cif.cif.lbm_dec_str = lbm_dec_str;
+		cif.cif.lbm_add_symbol_const = lbm_add_symbol_const;
+		cif.cif.lbm_block_ctx_from_extension = lbm_block_ctx_from_extension;
+		cif.cif.lbm_unblock_ctx = lbm_unblock_ctx;
+		cif.cif.lbm_get_current_cid = lbm_get_current_cid;
+
 		lib_init_done = true;
 	}