diff --git a/xform/instruction_descriptor.cpp b/xform/instruction_descriptor.cpp
index 406ef22c3a8bd735ffaed9b2e0faf74bb28ac7d7..2f93f50b2808151abccd0a97bb122999c6a0dbc9 100644
--- a/xform/instruction_descriptor.cpp
+++ b/xform/instruction_descriptor.cpp
@@ -5,6 +5,7 @@
 wahoo::Instruction::Instruction()
 {
   m_address = 0;
+  m_ibt_address = 0;
   m_size = -1;
   m_function = NULL;
   m_asm = "";
@@ -21,6 +22,7 @@ wahoo::Instruction::Instruction()
 wahoo::Instruction::Instruction(app_iaddr_t p_address, int p_size, Function* p_func)
 {
   m_address = p_address;
+  m_ibt_address = 0;
   m_size = p_size;
   m_function = p_func;
   m_isVisited = false;