diff --git a/src/gprs/gb_proxy.c b/src/gprs/gb_proxy.c
index 17a0109..6a9bc22 100644
--- a/src/gprs/gb_proxy.c
+++ b/src/gprs/gb_proxy.c
@@ -70,7 +70,7 @@
 };
 
 static const struct rate_ctr_group_desc global_ctrg_desc = {
-	.group_name_prefix = "gbproxy.global",
+	.group_name_prefix = "gbproxy:global",
 	.group_description = "GBProxy Global Statistics",
 	.num_ctr = ARRAY_SIZE(global_ctr_description),
 	.ctr_desc = global_ctr_description,
diff --git a/src/gprs/gb_proxy_peer.c b/src/gprs/gb_proxy_peer.c
index 69cce3a..f2cdd93 100644
--- a/src/gprs/gb_proxy_peer.c
+++ b/src/gprs/gb_proxy_peer.c
@@ -73,7 +73,7 @@
 osmo_static_assert(ARRAY_SIZE(peer_ctr_description) == GBPROX_PEER_CTR_LAST, everything_described);
 
 static const struct rate_ctr_group_desc peer_ctrg_desc = {
-	.group_name_prefix = "gbproxy.peer",
+	.group_name_prefix = "gbproxy:peer",
 	.group_description = "GBProxy Peer Statistics",
 	.num_ctr = ARRAY_SIZE(peer_ctr_description),
 	.ctr_desc = peer_ctr_description,
diff --git a/src/gprs/gtphub.c b/src/gprs/gtphub.c
index 7e3e663..5e962f2 100644
--- a/src/gprs/gtphub.c
+++ b/src/gprs/gtphub.c
@@ -125,7 +125,7 @@
 };
 
 static const struct rate_ctr_group_desc gtphub_ctrg_io_desc = {
-	.group_name_prefix = "gtphub.bind",
+	.group_name_prefix = "gtphub:bind",
 	.group_description = "I/O Statistics",
 	.num_ctr = ARRAY_SIZE(gtphub_counters_io_desc),
 	.ctr_desc = gtphub_counters_io_desc,