diff --git a/lib_xua/src/core/user/hid/user_hid.h b/lib_xua/src/core/user/hid/user_hid.h
index 0ed07904..b17a4dd5 100644
--- a/lib_xua/src/core/user/hid/user_hid.h
+++ b/lib_xua/src/core/user/hid/user_hid.h
@@ -31,7 +31,8 @@ typedef struct hidEvent_t {
   unsigned value;
 } hidEvent_t;
 
-#define HID_MAX_DATA_BYTES 4
+#define HID_MAX_DATA_BYTES ( 4 )
+#define HID_EVENT_INVALID_ID ( 0x100 )
 
 #if( 0 < HID_CONTROLS )
 
diff --git a/lib_xua/src/hid/hid.xc b/lib_xua/src/hid/hid.xc
index fd8f6fab..d9a0d500 100644
--- a/lib_xua/src/hid/hid.xc
+++ b/lib_xua/src/hid/hid.xc
@@ -39,7 +39,7 @@ unsigned HidIsSetIdleSilenced( const unsigned id )
 {
   unsigned isSilenced = hidIsIdleActive( id );
 
-  if( isSilenced ) {
+  if( !isSilenced ) {
     unsigned currentTime;
     // Use inline assembly to access the time without creating a side-effect.
     // The mapper complains if the time comes from an XC timer because this function is called in the guard of a select case.