diff --git a/armsrc/hitag2.c b/armsrc/hitag2.c
index 60cd76416..f49c4fc38 100644
--- a/armsrc/hitag2.c
+++ b/armsrc/hitag2.c
@@ -940,7 +940,7 @@ static bool hitag2_read_uid(uint8_t *rx, const size_t rxlen, uint8_t *tx, size_t
 }
 
 // Hitag2 Sniffing
-void SniffHitag(uint32_t type) {
+void SniffHitag(void) {
 
     LEDsoff();
     StopTicks();
diff --git a/armsrc/hitag2.h b/armsrc/hitag2.h
index 79ada4ddf..9e0fb84e6 100644
--- a/armsrc/hitag2.h
+++ b/armsrc/hitag2.h
@@ -14,7 +14,7 @@
 #include "common.h"
 #include "hitag.h"
 
-void SniffHitag(uint32_t type);
+void SniffHitag(void);
 void SimulateHitagTag(bool tag_mem_supplied, uint8_t *data);
 void ReaderHitag(hitag_function htf, hitag_data *htd);
 void WriterHitag(hitag_function htf, hitag_data *htd, int page);