diff --git a/core/mac/inc/qwlan_version.h b/core/mac/inc/qwlan_version.h
index 4d8ec3e48a..de5e8a493a 100644
--- a/core/mac/inc/qwlan_version.h
+++ b/core/mac/inc/qwlan_version.h
@@ -32,9 +32,9 @@
 #define QWLAN_VERSION_MAJOR            5
 #define QWLAN_VERSION_MINOR            2
 #define QWLAN_VERSION_PATCH            1
-#define QWLAN_VERSION_EXTRA            "N"
+#define QWLAN_VERSION_EXTRA            "O"
 #define QWLAN_VERSION_BUILD            91
 
-#define QWLAN_VERSIONSTR               "5.2.1.91N"
+#define QWLAN_VERSIONSTR               "5.2.1.91O"
 
 #endif /* QWLAN_VERSION_H */