diff --git a/common.c b/common.c
index d4c534f3..83837437 100644
--- a/common.c
+++ b/common.c
@@ -474,7 +474,8 @@ uint64_t get_absolute_time_in_fp() {
   uint64_t time_now_fp;
 #ifdef COMPILE_FOR_LINUX
   struct timespec tn;
-  clock_gettime(CLOCK_MONOTONIC_RAW, &tn);
+  // can't use CLOCK_MONOTONIC_RAW as it's not implemented in OpenWrt
+  clock_gettime(CLOCK_MONOTONIC, &tn);
   time_now_fp = ((uint64_t)tn.tv_sec << 32) + ((uint64_t)tn.tv_nsec << 32) / 1000000000;
 #endif
 #ifdef COMPILE_FOR_OSX