diff --git a/boot/cypress/MCUBootApp/os/os.h b/boot/cypress/MCUBootApp/os/os.h
new file mode 100644
index 0000000..8d581ca
--- /dev/null
+++ b/boot/cypress/MCUBootApp/os/os.h
@@ -0,0 +1,18 @@
+/***************************************************************************//**
+* \file os.h
+* \version 1.0
+*
+* \brief
+* Objective:
+*    Heap init prototype
+*
+********************************************************************************
+* \copyright
+* Copyright 2017-2018, Cypress Semiconductor Corporation. All rights reserved.
+* You may use this file only in accordance with the license, terms, conditions,
+* disclaimers, and limitations in the end user license agreement accompanying
+* the software package with which this file was provided.
+*******************************************************************************/
+
+
+void os_heap_init(void);
diff --git a/boot/cypress/MCUBootApp/os/os_heap.h b/boot/cypress/MCUBootApp/os/os_heap.h
new file mode 100644
index 0000000..0ea954c
--- /dev/null
+++ b/boot/cypress/MCUBootApp/os/os_heap.h
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#ifndef H_OS_HEAP_
+#define H_OS_HEAP_
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void *os_malloc(size_t size);
+void os_free(void *mem);
+void *os_realloc(void *ptr, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/boot/cypress/MCUBootApp/os/os_malloc.h b/boot/cypress/MCUBootApp/os/os_malloc.h
new file mode 100644
index 0000000..249b12c
--- /dev/null
+++ b/boot/cypress/MCUBootApp/os/os_malloc.h
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#ifndef H_OS_MALLOC_
+#define H_OS_MALLOC_
+
+#include "os/os_heap.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#undef  malloc
+#define malloc  os_malloc
+
+#undef  free
+#define free    os_free
+
+#undef  realloc
+#define realloc  os_realloc
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif