diff --git a/Labs/Lab4/echod.c b/Labs/Lab4/echod.c
index 2aa3bfe3a7e9e9e6b97331db86d21ab5df285a7e..3a1b1ec4ad2bac02e6a29cab16ba71e0821744af 100644
--- a/Labs/Lab4/echod.c
+++ b/Labs/Lab4/echod.c
@@ -130,13 +130,13 @@ main (int argc, char* argv[]) {
 
 		// receive the string sent by client
 		strcpy(in_msg, "");
-		recv(sd2, in_msg, BUFFER_SIZE, 0);
+		recv(sd2, &in_msg, BUFFER_SIZE, 0);
 	 	printf("done");	
 
 		
 		// send the received string back to client
 		//send(sd, buf, len flags);
-		send(sd2, in_msg, BUFFER_SIZE, 0); 
+		send(sd2, &in_msg, BUFFER_SIZE, 0); 
 
 		close(sd2);
 }
diff --git a/Labs/Lab4/echoreq.c b/Labs/Lab4/echoreq.c
index c968c6a3b381e3502b65c550767d7e383daad80d..58273646aa00ce0ff9fae4143152a0e351dee759 100644
--- a/Labs/Lab4/echoreq.c
+++ b/Labs/Lab4/echoreq.c
@@ -107,13 +107,13 @@ main(int argc, char* argv[]) {
         }
 
         // send message to server
-        send(sd, in_msg, BUFFER_SIZE, 0);
+        send(sd, &in_msg, BUFFER_SIZE, 0);
 	printf("sent");
            // send the received string back to client
 			printf("\n"); 
                 //                 //send(sd, buf, len flags);
         strcpy(in_msg, "");
-	recv(sd, in_msg, BUFFER_SIZE, 0);
+	recv(sd, &in_msg, BUFFER_SIZE, 0);
 
                 //
         // receive message echoed back by server