diff --git a/CHANGELOG.md b/CHANGELOG.md
index 16b4752..75af530 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 # Change Log
 
-### Version 2.0.0 (Dec 13th 2017)
+# Version [2.0.1](https://github.com/arduino-cmake/arduino-cmake/compare/v2.0.0...v2.0.1) (Dec 19th 2017)
+
+### Bug fixes
+
+* fixed `-DARDUINO` define for Arduino SDK versions between 1.0.0 and 1.5.8. This bug caused to included `WProgram.h` instead of `Arduino.h` for aforementioned versions.
+
+# Version 2.0.0 (Dec 13th 2017)
 
 An epic version which integrates too many changes to be listed and recorded since the latest stable version, which was **1.0.0**. It has been released almost <u>4 years ago</u>!
 
diff --git a/cmake/Platform/Core/BoardFlags/FlagsSetter.cmake b/cmake/Platform/Core/BoardFlags/FlagsSetter.cmake
index df05924..de0f97a 100644
--- a/cmake/Platform/Core/BoardFlags/FlagsSetter.cmake
+++ b/cmake/Platform/Core/BoardFlags/FlagsSetter.cmake
@@ -70,9 +70,7 @@ function(_get_normalized_sdk_version OUTPUT_VAR)
             # -DARDUINO format after 1.0.0 combines all 3 version parts together,
             # e.g. for 1.5.3 version -DARDUINO=153
             set(NORMALIZED_VERSION
-                    "${ARDUINO_SDK_VERSION_MAJOR}\
-            ${ARDUINO_SDK_VERSION_MINOR}\
-            ${ARDUINO_SDK_VERSION_PATCH}")
+                    "${ARDUINO_SDK_VERSION_MAJOR}${ARDUINO_SDK_VERSION_MINOR}${ARDUINO_SDK_VERSION_PATCH}")
         endif ()
     endif ()