diff --git a/lib/logger/logger.go b/lib/logger/logger.go
index ab411e3f0..80e7a97a7 100644
--- a/lib/logger/logger.go
+++ b/lib/logger/logger.go
@@ -123,7 +123,8 @@ func logMessage(level, msg string, skipframes int) {
 	mu.Unlock()
 
 	// Increment vm_log_messages_total
-	counterName := fmt.Sprintf(`vm_log_messages_total{app_version=%q, level=%q, file=%q, line="%d"}`, buildinfo.Version, levelLowercase, file, line)
+	location := fmt.Sprintf("%s:%d", file, line)
+	counterName := fmt.Sprintf(`vm_log_messages_total{app_version=%q, level=%q, location=%q}`, buildinfo.Version, levelLowercase, location)
 	metrics.GetOrCreateCounter(counterName).Inc()
 
 	switch level {