diff --git a/src/core/support/time_posix.c b/src/core/support/time_posix.c
index f28c2d7b78f..258b2e640e9 100644
--- a/src/core/support/time_posix.c
+++ b/src/core/support/time_posix.c
@@ -92,6 +92,7 @@ gpr_timespec gpr_now(gpr_clock_type clock) {
   struct timeval now_tv;
   double now_dbl;
 
+  now.clock_type = clock;
   switch (clock) {
     case GPR_CLOCK_REALTIME:
       gettimeofday(&now_tv, NULL);
diff --git a/src/core/support/time_win32.c b/src/core/support/time_win32.c
index fa77c74eeb1..238cd07ebc7 100644
--- a/src/core/support/time_win32.c
+++ b/src/core/support/time_win32.c
@@ -55,6 +55,7 @@ gpr_timespec gpr_now(gpr_clock_type clock) {
   struct _timeb now_tb;
   LARGE_INTEGER timestamp;
   double now_dbl;
+  now_tv.clock_type = clock;
   switch (clock) {
     case GPR_CLOCK_REALTIME:
       _ftime_s(&now_tb);