diff --git a/agent/agent.go b/agent/agent.go
index 45d4bb0ac2..229585b40e 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -882,12 +882,16 @@ const (
 )
 
 func (a *agent) reportConnection(id uuid.UUID, connectionType proto.Connection_Type, ip string) (disconnected func(code int, reason string)) {
-	// Remove the port from the IP because ports are not supported in coderd.
-	if host, _, err := net.SplitHostPort(ip); err != nil {
-		a.logger.Error(a.hardCtx, "split host and port for connection report failed", slog.F("ip", ip), slog.Error(err))
-	} else {
-		// Best effort.
-		ip = host
+	// A blank IP can unfortunately happen if the connection is broken in a data race before we get to introspect it. We
+	// still report it, and the recipient can handle a blank IP.
+	if ip != "" {
+		// Remove the port from the IP because ports are not supported in coderd.
+		if host, _, err := net.SplitHostPort(ip); err != nil {
+			a.logger.Error(a.hardCtx, "split host and port for connection report failed", slog.F("ip", ip), slog.Error(err))
+		} else {
+			// Best effort.
+			ip = host
+		}
 	}
 
 	// If the IP is "localhost" (which it can be in some cases), set it to