diff --git a/configure.ac b/configure.ac
index 43a4312..91875b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -141,7 +141,7 @@ AC_TYPE_PID_T
 # Checks for library functions.
 AC_FUNC_VPRINTF
 AC_FUNC_MMAP
-AC_CHECK_FUNCS([geteuid getuid link memmove memset mkstemp mkostemp _mktemp_s strchr strrchr strtol getopt getopt_long getprogname sysconf ftruncate chsize rand random lrand48 random_r rand_r realpath regcomp regerror readlink regexec regfree fstatvfs fstatfs lstat])
+AC_CHECK_FUNCS([link mkstemp mkostemp _mktemp_s getopt getopt_long getprogname rand random lrand48 random_r rand_r realpath regcomp regerror regexec regfree fstatvfs fstatfs lstat])
 
 dnl AC_CHECK_FUNCS doesn't check for header files.
 dnl posix_fadvise() may be not available in older libc.