diff --git a/libs/libc/time/lib_gmtimer.c b/libs/libc/time/lib_gmtimer.c
index b2c17fc5e5c..6012b2cc454 100644
--- a/libs/libc/time/lib_gmtimer.c
+++ b/libs/libc/time/lib_gmtimer.c
@@ -47,14 +47,6 @@
 
 #include <nuttx/time.h>
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-#define SEC_PER_MIN  ((time_t)60)
-#define SEC_PER_HOUR ((time_t)60 * SEC_PER_MIN)
-#define SEC_PER_DAY  ((time_t)24 * SEC_PER_HOUR)
-
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/