diff --git a/include/bal_types.h b/include/bal_types.h
index 29a2042..0d84ce7 100644
--- a/include/bal_types.h
+++ b/include/bal_types.h
@@ -9,8 +9,8 @@
 #include <stdint.h>
 
 
-typedef uint64_t bal_instruction_t;
 typedef uint64_t bal_guest_address_t;
+typedef uint32_t bal_instruction_t;
 typedef uint16_t bal_instruction_count_t;
 typedef uint16_t bal_ssa_id_t;
 typedef uint8_t  bal_bit_width_t;