diff --git a/src/sample.c b/src/sample.c
index c26882d..8bdbbe4 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -3222,6 +3222,9 @@
 static int
 smp_fetch_cpu_calls(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
+	if (!smp->strm)
+		return 0;
+
 	smp->data.type = SMP_T_SINT;
 	smp->data.u.sint = smp->strm->task->calls;
 	return 1;
@@ -3231,6 +3234,9 @@
 static int
 smp_fetch_cpu_ns_avg(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
+	if (!smp->strm)
+		return 0;
+
 	smp->data.type = SMP_T_SINT;
 	smp->data.u.sint = smp->strm->task->calls ? smp->strm->task->cpu_time / smp->strm->task->calls : 0;
 	return 1;
@@ -3240,6 +3246,9 @@
 static int
 smp_fetch_cpu_ns_tot(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
+	if (!smp->strm)
+		return 0;
+
 	smp->data.type = SMP_T_SINT;
 	smp->data.u.sint = smp->strm->task->cpu_time;
 	return 1;
@@ -3249,6 +3258,9 @@
 static int
 smp_fetch_lat_ns_avg(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
+	if (!smp->strm)
+		return 0;
+
 	smp->data.type = SMP_T_SINT;
 	smp->data.u.sint = smp->strm->task->calls ? smp->strm->task->lat_time / smp->strm->task->calls : 0;
 	return 1;
@@ -3258,6 +3270,9 @@
 static int
 smp_fetch_lat_ns_tot(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
+	if (!smp->strm)
+		return 0;
+
 	smp->data.type = SMP_T_SINT;
 	smp->data.u.sint = smp->strm->task->lat_time;
 	return 1;