diff --git a/rotator/sde_rotator_core.c b/rotator/sde_rotator_core.c
index 9066c7da..46c2be4b 100644
--- a/rotator/sde_rotator_core.c
+++ b/rotator/sde_rotator_core.c
@@ -572,7 +572,7 @@ static int sde_rotator_secure_session_ctrl(bool enable)
 
 			sid_info = (uint32_t *) shm.vaddr;
 			mem_addr = shm.paddr;
-			mem_size = shm.size;
+			mem_size = sizeof(uint32_t);
 		} else {
 			sid_info = kzalloc(sizeof(uint32_t), GFP_KERNEL);
 			if (!sid_info)