diff --git a/CMakeLists.txt b/CMakeLists.txt
index f6421cbf6b..79662ac657 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -132,6 +132,15 @@ project (Jerry C ASM)
   set(INCLUDE_LIBC_INTERFACE ${EXTERNAL_LIBC_INTERFACE})
  endif()
 
+
+ # Should we use external jerry-port.c?
+ if(DEFINED EXTERNAL_PORT_FILE AND NOT EXTERNAL_PORT_FILE STREQUAL "UNDEFINED")
+   set(SOURCE_PORT_IMPLEMENTATION ${EXTERNAL_PORT_FILE})
+   set(USE_DEFAULT_PORT FALSE)
+ else()
+   set(USE_DEFAULT_PORT TRUE)
+ endif()
+
 # Are there any interfaces for external libraries, other than libc, that should be registered?
  if(DEFINED EXTERNAL_LIBS_INTERFACE AND NOT EXTERNAL_LIBS_INTERFACE STREQUAL "UNDEFINED")
   set(INCLUDE_EXTERNAL_LIBS_INTERFACE )
diff --git a/jerry-core/CMakeLists.txt b/jerry-core/CMakeLists.txt
index 0a44797f6e..5a89e206b6 100644
--- a/jerry-core/CMakeLists.txt
+++ b/jerry-core/CMakeLists.txt
@@ -147,6 +147,13 @@ project (JerryCore C ASM)
       ${SOURCE_CORE_PARSER_REGEXP}
       ${SOURCE_CORE_JRT})
 
+ # Jerry port
+ if(USE_DEFAULT_PORT)
+   file(GLOB SOURCE_PORT_FILES ${CMAKE_SOURCE_DIR}/targets/default/*.c)
+ else()
+   set(SOURCE_PORT_FILES ${SOURCE_PORT_IMPLEMENTATION})
+ endif()
+
  # All-in-one build
  if("${ENABLE_ALL_IN_ONE}" STREQUAL "ON")
   set(ALL_IN_FILE "${CMAKE_BINARY_DIR}/jerry-all-in.c")
@@ -157,9 +164,13 @@ project (JerryCore C ASM)
    file(APPEND ${ALL_IN_FILE} "#include \"${FILE}\"\n")
   endforeach()
 
+  foreach(FILE ${SOURCE_PORT_FILES})
+   file(APPEND ${ALL_IN_FILE} "#include \"${FILE}\"\n")
+  endforeach()
+
   set(SOURCE_CORE ${ALL_IN_FILE})
  else()
-  set(SOURCE_CORE ${SOURCE_CORE_FILES})
+  set(SOURCE_CORE ${SOURCE_CORE_FILES} ${SOURCE_PORT_FILES})
  endif()
 
 # Per-option configuration
diff --git a/jerry-core/jerry-port.c b/targets/default/jerry-port.c
similarity index 100%
rename from jerry-core/jerry-port.c
rename to targets/default/jerry-port.c