diff --git a/hardware/asix-sigma/asix-sigma.c b/hardware/asix-sigma/asix-sigma.c
index 59faa6e2..c0a7aa42 100644
--- a/hardware/asix-sigma/asix-sigma.c
+++ b/hardware/asix-sigma/asix-sigma.c
@@ -42,7 +42,7 @@
 
 static GSList *dev_insts = NULL;
 
-static uint64_t supported_samplerates[] = {
+static const uint64_t supported_samplerates[] = {
 	SR_KHZ(200),
 	SR_KHZ(250),
 	SR_KHZ(500),
@@ -81,7 +81,7 @@ static const char *probe_names[NUM_PROBES + 1] = {
 	NULL,
 };
 
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	0,
 	0,
 	0,
diff --git a/hardware/chronovu-la8/chronovu-la8.c b/hardware/chronovu-la8/chronovu-la8.c
index ad3e7601..ba543d89 100644
--- a/hardware/chronovu-la8/chronovu-la8.c
+++ b/hardware/chronovu-la8/chronovu-la8.c
@@ -120,7 +120,7 @@ static uint64_t supported_samplerates[255 + 1] = { 0 };
  * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
  * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
  */
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	.low  = 0,
 	.high = 0,
 	.step = 0,
diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c
index c5a7719c..e511c0a6 100644
--- a/hardware/demo/demo.c
+++ b/hardware/demo/demo.c
@@ -86,7 +86,7 @@ static const int hwcaps[] = {
 	SR_HWCAP_CONTINUOUS,
 };
 
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	SR_HZ(1),
 	SR_GHZ(1),
 	SR_HZ(1),
diff --git a/hardware/fx2lafw/fx2lafw.c b/hardware/fx2lafw/fx2lafw.c
index 9897fb9e..a40a17ac 100644
--- a/hardware/fx2lafw/fx2lafw.c
+++ b/hardware/fx2lafw/fx2lafw.c
@@ -95,7 +95,7 @@ static const char *probe_names[] = {
 	NULL,
 };
 
-static uint64_t supported_samplerates[] = {
+static const uint64_t supported_samplerates[] = {
 	SR_KHZ(20),
 	SR_KHZ(25),
 	SR_KHZ(50),
@@ -115,7 +115,7 @@ static uint64_t supported_samplerates[] = {
 	0,
 };
 
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	0,
 	0,
 	0,
diff --git a/hardware/link-mso19/link-mso19.c b/hardware/link-mso19/link-mso19.c
index 19aa5225..abf1fb98 100644
--- a/hardware/link-mso19/link-mso19.c
+++ b/hardware/link-mso19/link-mso19.c
@@ -65,7 +65,7 @@ static const char *probe_names[NUM_PROBES + 1] = {
 	NULL,
 };
 
-static uint64_t supported_samplerates[] = {
+static const uint64_t supported_samplerates[] = {
 	SR_HZ(100),
 	SR_HZ(200),
 	SR_HZ(500),
@@ -89,7 +89,7 @@ static uint64_t supported_samplerates[] = {
 	0,
 };
 
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	0,
 	0,
 	0,
diff --git a/hardware/openbench-logic-sniffer/ols.c b/hardware/openbench-logic-sniffer/ols.c
index 7cdd77e6..275d25de 100644
--- a/hardware/openbench-logic-sniffer/ols.c
+++ b/hardware/openbench-logic-sniffer/ols.c
@@ -93,7 +93,7 @@ static const char *probe_names[NUM_PROBES + 1] = {
 };
 
 /* default supported samplerates, can be overridden by device metadata */
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	SR_HZ(10),
 	SR_MHZ(200),
 	SR_HZ(1),
diff --git a/hardware/zeroplus-logic-cube/zeroplus.c b/hardware/zeroplus-logic-cube/zeroplus.c
index 5066a9c8..808b7053 100644
--- a/hardware/zeroplus-logic-cube/zeroplus.c
+++ b/hardware/zeroplus-logic-cube/zeroplus.c
@@ -114,7 +114,7 @@ static libusb_context *usb_context = NULL;
  * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
  * that high.
  */
-static uint64_t supported_samplerates[] = {
+static const uint64_t supported_samplerates[] = {
 	SR_HZ(100),
 	SR_HZ(500),
 	SR_KHZ(1),
@@ -136,7 +136,7 @@ static uint64_t supported_samplerates[] = {
 	0,
 };
 
-static struct sr_samplerates samplerates = {
+static const struct sr_samplerates samplerates = {
 	0,
 	0,
 	0,
diff --git a/sigrok.h.in b/sigrok.h.in
index 87749d60..5fc1e187 100644
--- a/sigrok.h.in
+++ b/sigrok.h.in
@@ -449,7 +449,7 @@ struct sr_samplerates {
 	uint64_t low;
 	uint64_t high;
 	uint64_t step;
-	uint64_t *list;
+	const uint64_t *list;
 };
 
 struct sr_dev_driver {