diff --git a/src/audio/codec_adapter/codec/waves.c b/src/audio/codec_adapter/codec/waves.c
index ded143cc4..68848ef2e 100644
--- a/src/audio/codec_adapter/codec/waves.c
+++ b/src/audio/codec_adapter/codec/waves.c
@@ -598,7 +598,7 @@ static int waves_effect_setup_config(struct comp_dev *dev)
 	return ret;
 }
 
-int waves_codec_init(struct comp_dev *dev)
+static int waves_codec_init(struct comp_dev *dev)
 {
 	struct module_data *codec = comp_get_module_data(dev);
 	struct waves_codec_data *waves_codec;
@@ -629,7 +629,7 @@ int waves_codec_init(struct comp_dev *dev)
 	return ret;
 }
 
-int waves_codec_prepare(struct comp_dev *dev)
+static int waves_codec_prepare(struct comp_dev *dev)
 {
 	int ret;
 
@@ -666,7 +666,7 @@ static int waves_codec_init_process(struct comp_dev *dev)
 	return 0;
 }
 
-int waves_codec_process(struct comp_dev *dev)
+static int waves_codec_process(struct comp_dev *dev)
 {
 	int ret;
 	struct module_data *codec = comp_get_module_data(dev);
@@ -721,7 +721,7 @@ int waves_codec_process(struct comp_dev *dev)
 	return ret;
 }
 
-int waves_codec_apply_config(struct comp_dev *dev)
+static int waves_codec_apply_config(struct comp_dev *dev)
 {
 	int ret;
 
@@ -735,7 +735,7 @@ int waves_codec_apply_config(struct comp_dev *dev)
 	return ret;
 }
 
-int waves_codec_reset(struct comp_dev *dev)
+static int waves_codec_reset(struct comp_dev *dev)
 {
 	MaxxStatus_t status;
 	int ret = 0;
@@ -757,7 +757,7 @@ int waves_codec_reset(struct comp_dev *dev)
 	return ret;
 }
 
-int waves_codec_free(struct comp_dev *dev)
+static int waves_codec_free(struct comp_dev *dev)
 {
 	/* codec is using codec_adapter method module_allocate_memory for all allocations
 	 * codec_adapter will free it all on component free call
diff --git a/src/include/sof/audio/codec_adapter/codec/waves.h b/src/include/sof/audio/codec_adapter/codec/waves.h
deleted file mode 100644
index 4b82a3fe4..000000000
--- a/src/include/sof/audio/codec_adapter/codec/waves.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright(c) 2020 Waves Audio Ltd. All rights reserved.
- *
- * Author: Oleksandr Strelchenko <oleksandr.strelchenko@waves.com>
- */
-#ifndef __SOF_AUDIO_WAVES_CODEC__
-#define __SOF_AUDIO_WAVES_CODEC__
-
-int waves_codec_init(struct comp_dev *dev);
-int waves_codec_prepare(struct comp_dev *dev);
-int waves_codec_process(struct comp_dev *dev);
-int waves_codec_apply_config(struct comp_dev *dev);
-int waves_codec_reset(struct comp_dev *dev);
-int waves_codec_free(struct comp_dev *dev);
-
-#endif /* __SOF_AUDIO_WAVES_CODEC__ */