diff --git a/mbus/mbus-serial.c b/mbus/mbus-serial.c
index c0e009e..f5aa052 100644
--- a/mbus/mbus-serial.c
+++ b/mbus/mbus-serial.c
@@ -57,7 +57,7 @@ mbus_serial_connect(char *device)
         return NULL;
     }
 
-    bzero(&(handle->t), sizeof(handle->t));
+    memset(&(handle->t), 0, sizeof(handle->t));
     handle->t.c_cflag |= (CS8|CREAD|CLOCAL);
     handle->t.c_cflag |= PARENB;
 
@@ -228,7 +228,7 @@ mbus_serial_recv_frame(mbus_serial_handle *handle, mbus_frame *frame)
     if (handle == NULL || frame == NULL)
         return -1;
 
-    bzero((void *)buff, sizeof(buff));
+    memset((void *)buff, 0, sizeof(buff));
 
     //
     // read data until a packet is received
diff --git a/mbus/mbus-tcp.c b/mbus/mbus-tcp.c
index c718413..a1fd098 100644
--- a/mbus/mbus-tcp.c
+++ b/mbus/mbus-tcp.c
@@ -78,7 +78,7 @@ mbus_tcp_connect(char *host, int port)
         return NULL;
     }
 
-    bcopy((void *)(host_addr->h_addr), (void *)(&s.sin_addr), host_addr->h_length);
+    memcpy((void *)(&s.sin_addr), (void *)(host_addr->h_addr), host_addr->h_length);
 
     if (connect(handle->sock, (struct sockaddr *)&s, sizeof(s)) < 0)
     {
@@ -169,7 +169,7 @@ mbus_tcp_recv_frame(mbus_tcp_handle *handle, mbus_frame *frame)
     if (handle == NULL || frame == NULL)
         return -1;
 
-    bzero((void *)buff, sizeof(buff));
+    memset((void *)buff, 0, sizeof(buff));
 
     //
     // read data until a packet is received
diff --git a/test/mbus_parse.c b/test/mbus_parse.c
index 3f23999..69499b2 100644
--- a/test/mbus_parse.c
+++ b/test/mbus_parse.c
@@ -41,13 +41,13 @@ main(int argc, char *argv[])
         return 1;
     }
 
-	bzero(buf, sizeof(buf));
+	memset(buf, 0, sizeof(buf));
 	len = read(fd, buf, sizeof(buf));
 
 	close(fd);
 
-	bzero(&reply, sizeof(reply));
-	bzero(&frame_data, sizeof(frame_data));
+	memset(&reply, 0, sizeof(reply));
+	memset(&frame_data, 0, sizeof(frame_data));
 	mbus_parse(&reply, buf, len);
 	mbus_frame_data_parse(&reply, &frame_data);
 	mbus_frame_print(&reply);
diff --git a/test/mbus_parse_hex.c b/test/mbus_parse_hex.c
index 913b0d2..41b9278 100644
--- a/test/mbus_parse_hex.c
+++ b/test/mbus_parse_hex.c
@@ -41,7 +41,7 @@ main(int argc, char *argv[])
         return 1;
     }
 
-	bzero(raw_buff, sizeof(raw_buff));
+	memset(raw_buff, 0, sizeof(raw_buff));
 	len = read(fd, raw_buff, sizeof(raw_buff));
 	close(fd);
 
@@ -60,8 +60,8 @@ main(int argc, char *argv[])
         i++;
     }
 
-	bzero(&reply, sizeof(reply));
-	bzero(&frame_data, sizeof(frame_data));
+	memset(&reply, 0, sizeof(reply));
+	memset(&frame_data, 0, sizeof(frame_data));
 	
 	//mbus_parse_set_debug(1);