diff --git a/HISTORY b/HISTORY
index 5f206d3..1ff423d 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,3 +1,6 @@
+May. 13 2018
+Added platform dependent macros for Emscripten
+
 May. 9 2018
 Fixed a crash bug in invalid conditional expression with class member, thanks to AaBc for pointing it out
 Fixed a wrong error with the VAL statement
diff --git a/core/my_basic.h b/core/my_basic.h
index 94b6567..da9803e 100755
--- a/core/my_basic.h
+++ b/core/my_basic.h
@@ -30,7 +30,9 @@
 extern "C" {
 #endif /* __cplusplus */
 
-#if defined ARDUINO
+#if defined __EMSCRIPTEN__
+#	define MB_CP_EMSCRIPTEN
+#elif defined ARDUINO
 #	define MB_CP_ARDUINO
 #elif defined __BORLANDC__
 #	define MB_CP_BORLANDC
@@ -62,7 +64,9 @@ extern "C" {
 #	define MB_CP_UNKNOWN
 #endif /* Compiler dependent macro */
 
-#if defined _WIN64
+#if defined __EMSCRIPTEN__
+#	define MB_OS_HTML
+#elif defined _WIN64
 #	define MB_OS_WIN
 #	define MB_OS_WIN64
 #elif defined _WIN32