diff --git a/examples/keypadtest/keypadtest_main.c b/examples/keypadtest/keypadtest_main.c
index b39ce71c9..9d0343b9a 100644
--- a/examples/keypadtest/keypadtest_main.c
+++ b/examples/keypadtest/keypadtest_main.c
@@ -51,6 +51,8 @@
 #include <nuttx/input/keypad.h>
 
 #ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
+#  include <string.h>
+#  include <ctype.h>
 #  include <nuttx/streams.h>
 #  include <nuttx/input/kbd_codec.h>
 #endif
@@ -182,6 +184,8 @@ static void keypad_decode(FAR char *buffer, ssize_t nbytes)
           break;
         }
     }
+
+  fflush(stdout);
 }
 #endif