diff --git a/py/bc.h b/py/bc.h
index 4707da1793..c7dffbac59 100644
--- a/py/bc.h
+++ b/py/bc.h
@@ -94,9 +94,9 @@ mp_code_state_t *mp_obj_fun_bc_prepare_codestate(mp_obj_t func, size_t n_args, s
 struct _mp_obj_fun_bc_t;
 void mp_setup_code_state(mp_code_state_t *code_state, struct _mp_obj_fun_bc_t *self, size_t n_args, size_t n_kw, const mp_obj_t *args);
 void mp_bytecode_print(const void *descr, const byte *code, mp_uint_t len, const mp_uint_t *const_table);
-void mp_bytecode_print2(const byte *code, mp_uint_t len);
+void mp_bytecode_print2(const byte *code, size_t len, const mp_uint_t *const_table);
 const byte *mp_bytecode_print_str(const byte *ip);
-#define mp_bytecode_print_inst(code) mp_bytecode_print2(code, 1)
+#define mp_bytecode_print_inst(code, const_table) mp_bytecode_print2(code, 1, const_table)
 
 // Helper macros to access pointer with least significant bits holding flags
 #define MP_TAGPTR_PTR(x) ((void*)((uintptr_t)(x) & ~((uintptr_t)3)))
diff --git a/py/showbc.c b/py/showbc.c
index 684d9af0c0..9d20decdc8 100644
--- a/py/showbc.c
+++ b/py/showbc.c
@@ -82,7 +82,6 @@ const mp_uint_t *mp_showbc_const_table;
 
 void mp_bytecode_print(const void *descr, const byte *ip, mp_uint_t len, const mp_uint_t *const_table) {
     mp_showbc_code_start = ip;
-    mp_showbc_const_table = const_table;
 
     // get bytecode parameters
     mp_uint_t n_state = mp_decode_uint(&ip);
@@ -159,7 +158,7 @@ void mp_bytecode_print(const void *descr, const byte *ip, mp_uint_t len, const m
             printf("  bc=" INT_FMT " line=" UINT_FMT "\n", bc, source_line);
         }
     }
-    mp_bytecode_print2(ip, len - 0);
+    mp_bytecode_print2(ip, len - 0, const_table);
 }
 
 const byte *mp_bytecode_print_str(const byte *ip) {
@@ -547,8 +546,9 @@ const byte *mp_bytecode_print_str(const byte *ip) {
     return ip;
 }
 
-void mp_bytecode_print2(const byte *ip, mp_uint_t len) {
+void mp_bytecode_print2(const byte *ip, size_t len, const mp_uint_t *const_table) {
     mp_showbc_code_start = ip;
+    mp_showbc_const_table = const_table;
     while (ip < len + mp_showbc_code_start) {
         printf("%02u ", (uint)(ip - mp_showbc_code_start));
         ip = mp_bytecode_print_str(ip);
diff --git a/py/vm.c b/py/vm.c
index 363824e5f1..f4cfa2cd6f 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -38,8 +38,7 @@
 #include "py/bc.h"
 
 #if 0
-//#define TRACE(ip) printf("sp=" INT_FMT " ", sp - code_state->sp); mp_bytecode_print2(ip, 1);
-#define TRACE(ip) printf("sp=%d ", sp - code_state->sp); mp_bytecode_print2(ip, 1);
+#define TRACE(ip) printf("sp=%d ", (int)(sp - code_state->sp)); mp_bytecode_print2(ip, 1, code_state->const_table);
 #else
 #define TRACE(ip)
 #endif