diff --git a/src/posix/platform/vendor.cmake b/src/posix/platform/vendor.cmake
index 7c132728a..ad33f1192 100644
--- a/src/posix/platform/vendor.cmake
+++ b/src/posix/platform/vendor.cmake
@@ -55,7 +55,7 @@ if(OT_POSIX_CONFIG_RCP_BUS STREQUAL "VENDOR")
     if (OT_POSIX_CONFIG_RCP_VENDOR_DEPS_PACKAGE)
         include(${OT_POSIX_CONFIG_RCP_VENDOR_DEPS_PACKAGE})
         if (OT_POSIX_CONFIG_RCP_VENDOR_TARGET)
-            target_link_libraries(rcp-vendor-intf PRIVATE ${OT_POSIX_RCP_VENDOR_TARGET})
+            target_link_libraries(rcp-vendor-intf PRIVATE ${OT_POSIX_CONFIG_RCP_VENDOR_TARGET})
         endif()
     endif()
 endif()
diff --git a/src/posix/platform/vendor_extension_example.cmake b/src/posix/platform/vendor_extension_example.cmake
index c16d8f7fa..340dd8e0e 100644
--- a/src/posix/platform/vendor_extension_example.cmake
+++ b/src/posix/platform/vendor_extension_example.cmake
@@ -29,13 +29,13 @@
 # This file provides an example on how to implement a RCP vendor extension.
 
 # Set name of the cmake target to link with rcp-vendor-intf
-set(OT_POSIX_RCP_VENDOR_TARGET "vendor-lib")
+set(OT_POSIX_CONFIG_RCP_VENDOR_TARGET "vendor-lib")
 
 # Create library target using source file "vendor_source.cpp"
-add_library(${OT_POSIX_RCP_VENDOR_TARGET} vendor_source.cpp)
+add_library(${OT_POSIX_CONFIG_RCP_VENDOR_TARGET} vendor_source.cpp)
 
 # Include header files located at "${VENDOR_INCLUDE_PATH}"
-target_include_directories(${OT_POSIX_RCP_VENDOR_TARGET}
+target_include_directories(${OT_POSIX_CONFIG_RCP_VENDOR_TARGET}
     PRIVATE
         ${VENDOR_INCLUDE_PATH}
 )
@@ -49,7 +49,7 @@ if (EXAMPLE_DEPS_ENABLE)
     find_package(ExampleRcpVendorDeps)
 
     if(ExampleRcpVendorDeps_FOUND)
-        target_link_libraries(${OT_POSIX_RCP_VENDOR_TARGET} 
+        target_link_libraries(${OT_POSIX_CONFIG_RCP_VENDOR_TARGET} 
             PRIVATE
             ${ExampleRcpVendorDeps::ExampleRcpVendorDeps}
         )