diff --git a/core/gps_extended_c.h b/core/gps_extended_c.h
index 4cb9ede3..843105fb 100644
--- a/core/gps_extended_c.h
+++ b/core/gps_extended_c.h
@@ -418,7 +418,7 @@ enum loc_api_adapter_event_index {
     LOC_API_ADAPTER_GDT_UPLOAD_BEGIN_REQ,              // GDT upload start request
     LOC_API_ADAPTER_GDT_UPLOAD_END_REQ,                // GDT upload end request
     LOC_API_ADAPTER_GNSS_MEASUREMENT,                  // GNSS Measurement report
-
+    LOC_API_ADAPTER_REQUEST_TIMEZONE,                  // Timezone injection request
     LOC_API_ADAPTER_EVENT_MAX
 };
 
@@ -447,6 +447,7 @@ enum loc_api_adapter_event_index {
 #define LOC_API_ADAPTER_BIT_GDT_UPLOAD_BEGIN_REQ             (1<<LOC_API_ADAPTER_GDT_UPLOAD_BEGIN_REQ)
 #define LOC_API_ADAPTER_BIT_GDT_UPLOAD_END_REQ               (1<<LOC_API_ADAPTER_GDT_UPLOAD_END_REQ)
 #define LOC_API_ADAPTER_BIT_GNSS_MEASUREMENT                 (1<<LOC_API_ADAPTER_GNSS_MEASUREMENT)
+#define LOC_API_ADAPTER_BIT_REQUEST_TIMEZONE                 (1<<LOC_API_ADAPTER_REQUEST_TIMEZONE)
 
 typedef unsigned int LOC_API_ADAPTER_EVENT_MASK_T;
 
@@ -468,4 +469,3 @@ typedef uint32_t LOC_GPS_LOCK_MASK;
 #endif /* __cplusplus */
 
 #endif /* GPS_EXTENDED_C_H */
-