diff --git a/core/mac/src/include/dph_global.h b/core/mac/src/include/dph_global.h
index 9e1d62b19d..f7ef591d46 100644
--- a/core/mac/src/include/dph_global.h
+++ b/core/mac/src/include/dph_global.h
@@ -109,7 +109,6 @@ typedef struct sDphHashNode {
 	uint8_t lleEnabled:1;
 	/* set if both ap and sta are wsm capable */
 	uint8_t wsmEnabled:1;
-	uint8_t staAuthenticated:1;
 	uint8_t fAniCount:1;
 	uint8_t rmfEnabled:1;
 	/* Fragmentation size */