diff --git a/wgengine/magicsock/debugknobs.go b/wgengine/magicsock/debugknobs.go
index 1476b28f4..081144767 100644
--- a/wgengine/magicsock/debugknobs.go
+++ b/wgengine/magicsock/debugknobs.go
@@ -15,9 +15,6 @@ import (
 // Various debugging and experimental tweakables, set by environment
 // variable.
 var (
-	// logPacketDests prints the known addresses for a peer every time
-	// they change, in the legacy (non-discovery) endpoint code only.
-	logPacketDests, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_LOG_PACKET_DESTS"))
 	// debugDisco prints verbose logs of active discovery events as
 	// they happen.
 	debugDisco, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_DISCO"))
diff --git a/wgengine/magicsock/debugknobs_ios.go b/wgengine/magicsock/debugknobs_ios.go
index 1ebad76b3..677d8ed5b 100644
--- a/wgengine/magicsock/debugknobs_ios.go
+++ b/wgengine/magicsock/debugknobs_ios.go
@@ -7,7 +7,6 @@ package magicsock
 // All knobs are disabled on iOS.
 // Further, they're const, so the toolchain can produce smaller binaries.
 const (
-	logPacketDests          = false
 	debugDisco              = false
 	debugOmitLocalAddresses = false
 	debugUseDerpRouteEnv    = ""