diff --git a/runtime/onert/core/include/odc/IQuantizer.h b/runtime/onert/core/include/odc/IQuantizer.h
index d698d9ef0a4..3491d218547 100644
--- a/runtime/onert/core/include/odc/IQuantizer.h
+++ b/runtime/onert/core/include/odc/IQuantizer.h
@@ -17,6 +17,8 @@
 #ifndef __ONERT_ODC_IQUANTIZER_H__
 #define __ONERT_ODC_IQUANTIZER_H__
 
+#include "odc/QuantizeType.h"
+
 namespace onert
 {
 namespace odc
@@ -27,7 +29,7 @@ class IQuantizer
 public:
   virtual ~IQuantizer() = default;
 
-  virtual int quantize(const char *in, const char *out, bool is_q16) = 0;
+  virtual int quantize(const char *in, const char *out, QuantizeType qtype) = 0;
 };
 
 } // namespace odc
diff --git a/runtime/onert/odc/Quantizer.h b/runtime/onert/odc/Quantizer.h
index 869ed51c3e0..c87794bec5c 100644
--- a/runtime/onert/odc/Quantizer.h
+++ b/runtime/onert/odc/Quantizer.h
@@ -18,7 +18,6 @@
 #define __ONERT_ODC_QUANTIZE_H__
 
 #include "odc/IQuantizer.h"
-#include "odc/QuantizeType.h"
 
 namespace onert
 {
@@ -31,7 +30,7 @@ class Quantizer : public IQuantizer
   Quantizer() = default;
   ~Quantizer() = default;
 
-  int quantize(const char *in, const char *out, QuantizeType qtype);
+  int quantize(const char *in, const char *out, QuantizeType qtype) override;
 };
 
 } // namespace odc