diff --git a/pwrapic/src/pwrsys.c b/pwrapic/src/pwrsys.c
index bb8070cbac4285c097195086d5542415d549ca9a..cf4f7894a6d72553a93a2a0d6072806bed3374ef 100644
--- a/pwrapic/src/pwrsys.c
+++ b/pwrapic/src/pwrsys.c
@@ -30,7 +30,7 @@ int SetSysPowerState(const int powerState)
     } else if (powerState == PWR_DISK) {
         strncpy(state, "disk", strlen("disk") + 1);
     }
-    size_t dataLen = strlen(state);
+    size_t dataLen = strlen(state) + 1;
     input.dataLen = dataLen;
     input.data = state;
     RspOutputParam output;