diff --git a/docs/en/api-guides/build-system-cmake.rst b/docs/en/api-guides/build-system-cmake.rst
index bda55800b6..813857b617 100644
--- a/docs/en/api-guides/build-system-cmake.rst
+++ b/docs/en/api-guides/build-system-cmake.rst
@@ -344,8 +344,8 @@ The following variables are set at the project level, but available for use in c
 - ``IDF_TARGET``: Name of the target for which the project is being built.
 - ``PROJECT_VER``: Project version.
 
-  * If ``PROJECT_VER`` variable set in project CMakeLists.txt file, its value will be used.
-  * Else, if the ``${PROJECT_PATH}/version.txt`` exists, its contents will be used as ``PROJECT_VER``.
+  * If ``PROJECT_VER`` variable is set in project CMakeLists.txt file, its value will be used.
+  * Else, if the ``$(PROJECT_PATH}/version.txt`` exists, its contents will be used as ``PROJECT_VER``.
   * Else, if the project is located inside a Git repository, the output of git describe will be used.
   * Otherwise, ``PROJECT_VER`` will be "1".
 
@@ -426,10 +426,8 @@ Preprocessor Definitions
 
 The ESP-IDF build system adds the following C preprocessor definitions on the command line:
 
-- ``ESP_PLATFORM`` ： Can be used to detect that build happens within ESP-IDF.
-- ``IDF_VER`` ： Defined to a git version string.  E.g. ``v2.0`` for a tagged release or ``v1.0-275-g0efaa4f`` for an arbitrary commit.
-- ``PROJECT_VER``: The project version, see `Preset Component Variables`_ for more details.
-- ``PROJECT_NAME``: Name of the project, as set in project CMakeLists.txt file.
+- ``ESP_PLATFORM`` : Can be used to detect that build happens within ESP-IDF.
+- ``IDF_VER`` : Defined to a git version string.  E.g. ``v2.0`` for a tagged release or ``v1.0-275-g0efaa4f`` for an arbitrary commit.
 
 Component Requirements
 ======================
diff --git a/docs/en/api-guides/build-system.rst b/docs/en/api-guides/build-system.rst
index 70eac2755b..8c85c65d3c 100644
--- a/docs/en/api-guides/build-system.rst
+++ b/docs/en/api-guides/build-system.rst
@@ -190,10 +190,10 @@ The following variables are set at the project level, but exported for use in th
 - ``IDF_VER``: ESP-IDF version, retrieved from either ``$(IDF_PATH)/version.txt`` file (if present) else using git command ``git describe``. Recommended format here is single liner that specifies major IDF release version, e.g. ``v2.0`` for a tagged release or ``v2.0-275-g0efaa4f`` for an arbitrary commit. Application can make use of this by calling :cpp:func:`esp_get_idf_version`.
 - ``PROJECT_VER``: Project version. 
 
-* If ``PROJECT_VER`` variable set in project Makefile file, its value will be used.
-* Else, if the ``$PROJECT_PATH/version.txt`` exists, its contents will be used as ``PROJECT_VER``.
-* Else, if the project is located inside a Git repository, the output of git describe will be used.
-* Otherwise, ``PROJECT_VER`` will be "1".
+  * If ``PROJECT_VER`` variable is set in project Makefile file, its value will be used.
+  * Else, if the ``$PROJECT_PATH/version.txt`` exists, its contents will be used as ``PROJECT_VER``.
+  * Else, if the project is located inside a Git repository, the output of git describe will be used.
+  * Otherwise, ``PROJECT_VER`` will be "1".
 
 If you modify any of these variables inside ``component.mk`` then this will not prevent other components from building but it may make your component hard to build and/or debug.
 
@@ -309,8 +309,6 @@ ESP-IDF build systems adds the following C preprocessor definitions on the comma
 
 - ``ESP_PLATFORM`` — Can be used to detect that build happens within ESP-IDF.
 - ``IDF_VER`` — ESP-IDF version, see `Preset Component Variables`_ for more details.
-- ``PROJECT_VER``: The project version, see `Preset Component Variables`_ for more details.
-- ``PROJECT_NAME``: Name of the project, as set in project Makefile.
 
 Build Process Internals
 -----------------------
diff --git a/docs/en/api-reference/system/system.rst b/docs/en/api-reference/system/system.rst
index 1a2f9c480a..33fddc3bd4 100644
--- a/docs/en/api-reference/system/system.rst
+++ b/docs/en/api-reference/system/system.rst
@@ -114,12 +114,12 @@ App version
 Application version is stored in :cpp:class:`esp_app_desc_t` structure. It is located in DROM sector and has a fixed offset from the beginning of the binary file. 
 The structure is located after :cpp:class:`esp_image_header_t` and :cpp:class:`esp_image_segment_header_t` structures. The field version has string type and max length 32 chars.
 
-To set version in your project manually you need set ``PROJECT_VER`` varible in your project Makefile/CMakeLists.txt:
+To set version in your project manually you need to set ``PROJECT_VER`` variable in your project Makefile/CMakeLists.txt:
 
 * For Make build system: in application Makefile put ``PROJECT_VER = "0.1.0.1"`` before including project.mk 
 * For Cmake build system: in application CMakeLists.txt put ``set(PROJECT_VER "0.1.0.1")`` before including project.cmake. 
 
-If ``PROJECT_VER`` variable did not set in project Makefile/CMakeLists.txt then it can retrieved from either ``$(PROJECT_PATH)/version.txt`` file (if present) else using git command ``git describe``. Application can make use of this by calling :cpp:func:`esp_ota_get_app_description` or :cpp:func:`esp_ota_get_partition_description` functions.
+If ``PROJECT_VER`` variable is not set in project Makefile/CMakeLists.txt then it will be retrieved from either ``$(PROJECT_PATH)/version.txt`` file (if present) else using git command ``git describe``. If neither is available then ``PROJECT_VER`` will be set to “1”. Application can make use of this by calling :cpp:func:`esp_ota_get_app_description` or :cpp:func:`esp_ota_get_partition_description` functions.
 
 API Reference
 -------------