diff --git a/lib/roken/strftime.c b/lib/roken/strftime.c
index 3e429a7ba..69dab94a1 100644
--- a/lib/roken/strftime.c
+++ b/lib/roken/strftime.c
@@ -35,11 +35,11 @@
 #include <config.h>
 #endif
 #include <sys/types.h>
-#if TIME_WITH_SYS_TIME
+#ifdef TIME_WITH_SYS_TIME
 #include <sys/time.h>
 #include <time.h>
 #else
-#if HAVE_SYS_TIME_H
+#ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #else
 #include <time.h>