diff --git a/lib/timeval.c b/lib/timeval.c
index 193c7bab1..0abe7e555 100644
--- a/lib/timeval.c
+++ b/lib/timeval.c
@@ -41,6 +41,8 @@
 
 VLOG_DEFINE_THIS_MODULE(timeval);
 
+COVERAGE_DEFINE(long_poll_interval);
+
 #if !defined(HAVE_CLOCK_GETTIME)
 typedef unsigned int clockid_t;
 static int clock_gettime(clock_t id, struct timespec *ts);
@@ -644,6 +646,8 @@ log_poll_interval(long long int last_wakeup)
         const struct rusage *last_rusage = get_recent_rusage();
         struct rusage rusage;
 
+        COVERAGE_INC(long_poll_interval);
+
         if (!getrusage_thread(&rusage)) {
             VLOG_WARN("Unreasonably long %lldms poll interval"
                       " (%lldms user, %lldms system)",