diff --git a/headers/posix/time.h b/headers/posix/time.h
index b70293c14d..ffe9423d32 100644
--- a/headers/posix/time.h
+++ b/headers/posix/time.h
@@ -11,8 +11,8 @@
 
 typedef long clock_t;
 typedef long time_t;
-typedef long suseconds_t;
-typedef long useconds_t;
+typedef long long suseconds_t;
+typedef unsigned long long useconds_t;
 
 #define CLOCKS_PER_SEC	1000
 #define CLK_TCK			CLOCKS_PER_SEC