diff --git a/webserver/core/lib/iec_types.h b/webserver/core/lib/iec_types.h
index 0dc5cac..609e5b6 100755
--- a/webserver/core/lib/iec_types.h
+++ b/webserver/core/lib/iec_types.h
@@ -35,8 +35,8 @@ typedef double   IEC_LREAL;
  *          (these macros may be found in iec_std_lib.h)
  */
 typedef struct {
-    long int tv_sec;            /* Seconds.  */
-    long int tv_nsec;           /* Nanoseconds.  */
+    int32_t tv_sec;            /* Seconds.  */
+    int32_t tv_nsec;           /* Nanoseconds.  */
 } /* __attribute__((packed)) */ IEC_TIMESPEC;  /* packed is gcc specific! */
 
 typedef IEC_TIMESPEC IEC_TIME;