diff --git a/graphics/twm4nx/src/cinput.cxx b/graphics/twm4nx/src/cinput.cxx
index 291234fa0..8c7788daa 100644
--- a/graphics/twm4nx/src/cinput.cxx
+++ b/graphics/twm4nx/src/cinput.cxx
@@ -817,7 +817,7 @@ int CInput::session(void)
 
       if ((pfd[KBD_INDEX].revents & (POLLERR | POLLHUP)) != 0)
         {
-          twmerr("ERROR: keyboard poll() failed. revents=%04x\n",
+          twmerr("ERROR: keyboard poll() failed. revents=%08" PRIx32 "\n",
                  pfd[KBD_INDEX].revents);
           ret = -EIO;
           break;
@@ -839,7 +839,7 @@ int CInput::session(void)
 
       if ((pfd[MOUSE_INDEX].revents & (POLLERR | POLLHUP)) != 0)
         {
-          twmerr("ERROR: Mouse poll() failed. revents=%04x\n",
+          twmerr("ERROR: Mouse poll() failed. revents=%08" PRIx32 "\n",
                  pfd[MOUSE_INDEX].revents);
           ret = -EIO;
           break;
diff --git a/netutils/thttpd/fdwatch.c b/netutils/thttpd/fdwatch.c
index 6d9c5a3ec..22423fa15 100644
--- a/netutils/thttpd/fdwatch.c
+++ b/netutils/thttpd/fdwatch.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * apps/netutils/thttpd/timers.c
+ * apps/netutils/thttpd/fdwatch.c
  * FD watcher routines for poll()
  *
  *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
@@ -296,7 +296,7 @@ int fdwatch(struct fdwatch_s *fw, long timeout_msecs)
             {
               /* Yes... save it in a shorter list */
 
-              fwinfo("pollndx: %d fd: %d revents: %04x\n",
+              fwinfo("pollndx: %d fd: %d revents: %08" PRIx32 "\n",
                     i, fw->pollfds[i].fd, fw->pollfds[i].revents);
 
               fw->ready[fw->nactive++] = fw->pollfds[i].fd;