diff --git a/mbed.h b/mbed.h
index baabacb2584..43ab4827fcc 100644
--- a/mbed.h
+++ b/mbed.h
@@ -18,6 +18,23 @@
 
 #define MBED_LIBRARY_VERSION 128
 
+#if MBED_CONF_RTOS_PRESENT
+// RTOS present, this is valid only for mbed OS 5
+#define MBED_MAJOR_VERSION 5
+#define MBED_MINOR_VERSION 2
+#define MBED_PATCH_VERSION 1
+
+#else
+// mbed 2
+#define MBED_MAJOR_VERSION 2
+#define MBED_MINOR_VERSION 0
+#define MBED_PATCH_VERSION MBED_LIBRARY_VERSION
+#endif
+
+#define MBED_ENCODE_VERSION(major, minor, patch) ((major)*10000 + (minor)*100 + (patch))
+
+#define MBED_VERSION MBED_ENCODE_VERSION(MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION)
+
 #if MBED_CONF_RTOS_PRESENT
 #include "rtos/rtos.h"
 #endif