diff --git a/documentation/sdk-manual/appendix-customizing-standard.rst b/documentation/sdk-manual/appendix-customizing-standard.rst
index 9bc70cf55c..c619c15e46 100644
--- a/documentation/sdk-manual/appendix-customizing-standard.rst
+++ b/documentation/sdk-manual/appendix-customizing-standard.rst
@@ -29,6 +29,6 @@ You can include API documentation as well as any other documentation
 provided by recipes with the standard SDK by adding "api-documentation"
 to the
 :term:`DISTRO_FEATURES`
-variable: DISTRO_FEATURES_append = " api-documentation" Setting this
+variable: DISTRO_FEATURES:append = " api-documentation" Setting this
 variable as shown here causes the OpenEmbedded build system to build the
 documentation and then include it in the standard SDK.
diff --git a/documentation/sdk-manual/appendix-obtain.rst b/documentation/sdk-manual/appendix-obtain.rst
index fc6b8b9d5c..841abac5aa 100644
--- a/documentation/sdk-manual/appendix-obtain.rst
+++ b/documentation/sdk-manual/appendix-obtain.rst
@@ -163,7 +163,7 @@ build the SDK installer. Follow these steps:
          SDK installer. Doing so ensures that the eventual SDK
          installation process installs the appropriate library packages
          as part of the SDK. Following is an example using ``libc``
-         static development libraries: TOOLCHAIN_TARGET_TASK_append = "
+         static development libraries: TOOLCHAIN_TARGET_TASK:append = "
          libc-staticdev"
 
 7. *Run the Installer:* You can now run the SDK installer from
diff --git a/documentation/sdk-manual/extensible.rst b/documentation/sdk-manual/extensible.rst
index 2cdb06d65c..bdce0414e4 100644
--- a/documentation/sdk-manual/extensible.rst
+++ b/documentation/sdk-manual/extensible.rst
@@ -838,7 +838,7 @@ recipe.
 If you need to add runtime dependencies, you can do so by adding the
 following to your recipe::
 
-   RDEPENDS_${PN} += "dependency1 dependency2 ..."
+   RDEPENDS:${PN} += "dependency1 dependency2 ..."
 
 .. note::