diff --git a/lib/nodes/influxdb.c b/lib/nodes/influxdb.c
index 01427c90d..da1461655 100644
--- a/lib/nodes/influxdb.c
+++ b/lib/nodes/influxdb.c
@@ -21,6 +21,7 @@
  *********************************************************************************/
 
 #include <string.h>
+#include <inttypes.h>
 
 #include "node.h"
 #include "plugin.h"
@@ -159,7 +160,7 @@ int influxdb_write(struct node *n, struct sample *smps[], unsigned cnt)
 
 			switch (sample_get_data_format(smps[k], j)) {
 				case SAMPLE_DATA_FORMAT_FLOAT:	strcatf(&buf, "%f", smps[k]->data[j].f); break;
-				case SAMPLE_DATA_FORMAT_INT:	strcatf(&buf, "%ld", smps[k]->data[j].i); break;
+				case SAMPLE_DATA_FORMAT_INT:	strcatf(&buf, "%" PRIi64, smps[k]->data[j].i); break;
 			}
 		}
 
diff --git a/lib/nodes/test_rtt.c b/lib/nodes/test_rtt.c
index 84e1e77d9..e3747cb62 100644
--- a/lib/nodes/test_rtt.c
+++ b/lib/nodes/test_rtt.c
@@ -319,7 +319,7 @@ int test_rtt_read(struct node *n, struct sample *smps[], unsigned cnt)
 	/* Wait */
 	steps = task_wait(&t->task);
 	if (steps > 1)
-		warn("Skipped %zu steps", steps - 1);
+		warn("Skipped %ld steps", (long) (steps - 1));
 
 	struct timespec now = time_now();
 
diff --git a/lib/task.c b/lib/task.c
index 9b05e5da6..0013bed10 100644
--- a/lib/task.c
+++ b/lib/task.c
@@ -95,7 +95,7 @@ int task_set_rate(struct task *t, double rate)
 
 	next = time_add(&now, &t->period);
 
-	return time_set_next(t, &next);
+	return task_set_next(t, &next);
 #elif PERIODIC_TASK_IMPL == TIMERFD
 	int ret;
 	struct itimerspec its = {
@@ -158,8 +158,6 @@ uint64_t task_wait(struct task *t)
 	if (ret < 0)
 		return 0;
 
-	struct timespec now;
-
 	ret = clock_gettime(t->clock, &now);
 	if (ret)
 		return 0;