diff --git a/src/main/log.c b/src/main/log.c
index bf5fdbe..3d2d70c 100644
--- a/src/main/log.c
+++ b/src/main/log.c
@@ -104,8 +104,12 @@ gboolean li_log_write_(liServer *srv, liVRequest *vr, liLogLevel log_level, guin
 
 		if (cur_ts != ts->last_ts) {
 			gsize s;
+#ifdef HAVE_LOCALTIME_R
 			struct tm tm;
+#endif
+
 			g_string_set_size(ts->cached, 255);
+
 #ifdef HAVE_LOCALTIME_R
 			s = strftime(ts->cached->str, ts->cached->allocated_len,
 				ts->format->str, localtime_r(&cur_ts, &tm));
diff --git a/src/main/server.c b/src/main/server.c
index 5927a22..46c6757 100644
--- a/src/main/server.c
+++ b/src/main/server.c
@@ -428,7 +428,9 @@ GString *li_server_current_timestamp() {
 
 	if (cur_ts != *last_ts) {
 		gsize s;
+#ifdef HAVE_GMTIME_R
 		struct tm tm;
+#endif
 
 		g_string_set_size(ts_str, 255);
 #ifdef HAVE_GMTIME_R
diff --git a/wscript b/wscript
index 3420670..a8cc597 100644
--- a/wscript
+++ b/wscript
@@ -152,6 +152,8 @@ def configure(conf):
 	conf.check(function_name='fpathconf', header_name='unistd.h', define_name='HAVE_FPATHCONF')
 	conf.check(function_name='pathconf', header_name='unistd.h', define_name='HAVE_PATHCONF')
 	conf.check(function_name='dirfd', header_name=['sys/types.h', 'dirent.h'], define_name='HAVE_DIRFD')
+	conf.check(function_name='localtime_r', header_name=['time.h'], define_name='HAVE_LOCALTIME_R')
+	conf.check(function_name='gmtime_r', header_name=['time.h'], define_name='HAVE_GMTIME_R')
 
 	conf.sub_config('src/common')
 	conf.sub_config('src/angel')