diff --git a/Linux/package/include/sgx_tsgxssl.edl b/Linux/package/include/sgx_tsgxssl.edl
index 5aa6e64b..ec65d398 100644
--- a/Linux/package/include/sgx_tsgxssl.edl
+++ b/Linux/package/include/sgx_tsgxssl.edl
@@ -37,7 +37,7 @@ enclave {
     
     untrusted {
         void u_sgxssl_ftime([out, size=timeb_len] void * timeptr, uint32_t timeb_len);
-        void u_sgxssl_usleep(int micro_seconds);
+        //void u_sgxssl_usleep(int micro_seconds);
     };
 
 };
diff --git a/Linux/sgx/libsgx_tsgxssl/ttime.cpp b/Linux/sgx/libsgx_tsgxssl/ttime.cpp
index e3a0e937..02930cdd 100644
--- a/Linux/sgx/libsgx_tsgxssl/ttime.cpp
+++ b/Linux/sgx/libsgx_tsgxssl/ttime.cpp
@@ -121,10 +121,12 @@ int sgxssl_clock_gettime(int clk_id, struct timespec *tp)
 
 void sgxssl_usleep(int micro_seconds)
 {
-	u_sgxssl_usleep(micro_seconds);
+	(void)(micro_seconds);
+	return;
 }
 void sgxssl_sleep(int seconds)
 {
-        u_sgxssl_usleep(1000000 * seconds);
+        (void)(seconds);
+	return;
 }
 }