diff --git a/configure.ac b/configure.ac
index aa1916c..e14e3c2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,7 +38,7 @@ AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 
 AC_CHECK_HEADERS([sys/types.h])
-AC_CHECK_FUNCS([memset letoh32 htole32 pow strerror])
+AC_CHECK_FUNCS([bzero memset letoh32 htole32 pow strerror])
 
 AC_CHECK_HEADERS([endian.h sys/endian.h CoreFoundation/CoreFoundation.h])
 if test $ac_cv_header_endian_h = "no" -a $ac_cv_header_sys_endian_h = "no" -a $ac_cv_header_CoreFoundation_CoreFoundation_h = "no"; then