1 files changed, 2 insertions, 0 deletions

diff --git a/include/libbb.h b/include/libbb.h
index a2c699b54..04071639a 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -342,6 +342,8 @@ extern int *const bb_errno;
 uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
 #endif
 
+unsigned long FAST_FUNC isqrt(unsigned long long N);
+
 unsigned long long monotonic_ns(void) FAST_FUNC;
 unsigned long long monotonic_us(void) FAST_FUNC;
 unsigned long long monotonic_ms(void) FAST_FUNC;