1 files changed, 3 insertions, 4 deletions

diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 43ae98065..e8c027f17 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -59,24 +59,23 @@ char* FAST_FUNC strncpy_IFNAMSIZ(char *dst, const char *src)
  * A truncated result contains the first few digits of the result ala strncpy.
  * Returns a pointer past last generated digit, does _not_ store NUL.
  */
-void BUG_sizeof(void);
 char* FAST_FUNC utoa_to_buf(unsigned n, char *buf, unsigned buflen)
 {
         unsigned i, out, res;
 
         if (buflen) {
                 out = 0;
+
+                BUILD_BUG_ON(sizeof(n) != 4 && sizeof(n) != 8);
                 if (sizeof(n) == 4)
                 // 2^32-1 = 4294967295
                         i = 1000000000;
-#if UINT_MAX > 4294967295 /* prevents warning about "const too large" */
+#if UINT_MAX > 0xffffffff /* prevents warning about "const too large" */
                 else
                 if (sizeof(n) == 8)
                 // 2^64-1 = 18446744073709551615
                         i = 10000000000000000000;
 #endif
-                else
-                        BUG_sizeof();
                 for (; i; i /= 10) {
                         res = n / i;
                         n = n % i;