diff --git a/include/interfaces/irdb/STARSInstruction.h b/include/interfaces/irdb/STARSInstruction.h
index f106a94e502939a13847b49a88a60b48248a0ff6..59a750c83008c651d6b33beac526fc5696e213be 100644
--- a/include/interfaces/irdb/STARSInstruction.h
+++ b/include/interfaces/irdb/STARSInstruction.h
@@ -45,10 +45,10 @@ class STARS_IRDB_Instruction_t : public STARS_Instruction_t
 		// see .cpp
 		virtual uint16_t GetIDAOpcode(void) const;
 
-		virtual STARS_InstructionID_t GetNextInstructionID(void) 
+		virtual STARS_InstructionID_t GetNextInstructionID(void)  const
 		{ return STARS_InstructionID_t(irdb_insn->GetTarget()->GetBaseID()); }
 
-		virtual STARS_InstructionID_t GetTargetInstructionID(void) 
+		virtual STARS_InstructionID_t GetTargetInstructionID(void)  const
 		{ return STARS_InstructionID_t(irdb_insn->GetFallthrough()->GetBaseID()); }
 
 // jdh: what are features?