diff --git a/src/bytecode/bytecode.cc b/src/bytecode/bytecode.cc
index 58950d1..2f75371 100644
--- a/src/bytecode/bytecode.cc
+++ b/src/bytecode/bytecode.cc
@@ -25,7 +25,7 @@ Bytecode::Bytecode(ByteArray ba)
     uint32_t code_start = byte_array_.get_uint32(TOC_START + (3 * TOC_RECORD_SZ));
     for (uint32_t i = 0; i < cache_.n_functions; ++i) {
         cache_.function_addr.emplace_back(code_start + byte_array_.get_uint32(cache_.functions_idx_addr + (i * FUNCTION_RECORD_SZ)));
-        cache_.function_sz.emplace_back(code_start + byte_array_.get_uint32(cache_.functions_idx_addr + (i * FUNCTION_RECORD_SZ) + 8));
+        cache_.function_sz.emplace_back(byte_array_.get_uint32(cache_.functions_idx_addr + (i * FUNCTION_RECORD_SZ) + 8));
     }
 }
 
diff --git a/src/bytecode/tests.cc b/src/bytecode/tests.cc
index a0dc262..fba1aa5 100644
--- a/src/bytecode/tests.cc
+++ b/src/bytecode/tests.cc
@@ -140,6 +140,8 @@ TEST(Bytecode, Parsing)
 
     ASSERT_EQ(bc.n_constants(), 2);
     ASSERT_EQ(bc.n_functions(), 2);
+    ASSERT_EQ(bc.get_function_sz(0), 2);
+    ASSERT_EQ(bc.get_function_sz(1), 1);
 
     ASSERT_FLOAT_EQ(std::get<float>(bc.get_constant(0)), 3.14f);
     ASSERT_EQ(std::get<std::string>(bc.get_constant(1)), "HELLO");