diff --git a/client/src/cmdhficlass.c b/client/src/cmdhficlass.c
index e4022d0274..cf5c33bf50 100644
--- a/client/src/cmdhficlass.c
+++ b/client/src/cmdhficlass.c
@@ -123,14 +123,6 @@ typedef enum {
     TRIPLEDES
 } BLOCK79ENCRYPTION;
 
-static inline uint32_t leadingzeros(uint64_t a) {
-#if defined __GNUC__
-    return __builtin_clzll(a);
-#else
-    return 0;
-#endif
-}
-
 static void iclass_upload_emul(uint8_t *d, uint16_t n, uint16_t offset, uint16_t *bytes_sent) {
 
     struct p {