diff --git a/chat.c b/chat.c
index 20c0162..bd21313 100644
--- a/chat.c
+++ b/chat.c
@@ -121,7 +121,7 @@ static void chat_onKey(ToxWindow *self, int key)
         wattroff(ctx->history, COLOR_PAIR(1));
         wprintw(ctx->history, "%s\n", ctx->line);
       }
-      if (m_sendmessage(ctx->friendnum, (uint8_t*) ctx->line, strlen(ctx->line)+1) < 0) {
+      if (m_sendmessage(ctx->friendnum, (uint8_t*) ctx->line, strlen(ctx->line)+1) == 0) {
         wattron(ctx->history, COLOR_PAIR(3));
         wprintw(ctx->history, " * Failed to send message.\n");
         wattroff(ctx->history, COLOR_PAIR(3));
diff --git a/prompt.c b/prompt.c
index d79d061..0bdf69f 100644
--- a/prompt.c
+++ b/prompt.c
@@ -291,7 +291,7 @@ static void execute(ToxWindow *self, char *u_cmd)
     }
     msg[0] = 0;
     msg++;
-    if (m_sendmessage(atoi(id), (uint8_t*) msg, strlen(msg)+1) < 0)
+    if (m_sendmessage(atoi(id), (uint8_t*) msg, strlen(msg)+1) == 0)
       wprintw(self->window, "Error occurred while sending message.\n");
     else
       wprintw(self->window, "Message successfully sent.\n");
@@ -372,7 +372,7 @@ static void print_usage(ToxWindow *self)
   wprintw(self->window, "      myid                      : Print your ID\n");
   wprintw(self->window, "      quit/exit                 : Exit program\n");
   wprintw(self->window, "      help                      : Print this message again\n");
-  wprintw(self->window, "      clear                     : Clear this window\n"); 
+  wprintw(self->window, "      clear                     : Clear this window\n");
   
   wattron(self->window, A_BOLD);
   wprintw(self->window, "TIP: Use the TAB key to navigate through the tabs.\n\n");