diff --git a/ndn-cpp/c/util/time.c b/ndn-cpp/c/util/time.c
index a794047..9da0e1c 100644
--- a/ndn-cpp/c/util/time.c
+++ b/ndn-cpp/c/util/time.c
@@ -7,7 +7,7 @@
 #include <sys/time.h>
 #include "time.h"
 
-double 
+ndn_MillisecondsSince1970 
 ndn_getNowMilliseconds()
 {
   struct timeval t;