diff --git a/docs/content/en/docs/reference/metrics.md b/docs/content/en/docs/reference/metrics.md
index ff0ee4cc92c..92b64c9dcb9 100644
--- a/docs/content/en/docs/reference/metrics.md
+++ b/docs/content/en/docs/reference/metrics.md
@@ -42,7 +42,7 @@ The total number of Tetragon errors. For internal use only.
 
 | label | values |
 | ----- | ------ |
-| `type ` | `event_finalize_process_info_failed, event_missing_process_info, handler_error, process_cache_evicted, process_cache_miss_on_get, process_cache_miss_on_remove, process_pid_tid_mismatch` |
+| `type ` | `event_finalize_process_info_failed, event_missing_process_info, handler_error, process_cache_evicted, process_cache_miss_on_get, process_cache_miss_on_remove, process_metadata_username_failed, process_pid_tid_mismatch` |
 
 ### `tetragon_event_cache_accesses_total`
 
diff --git a/pkg/metrics/errormetrics/errormetrics.go b/pkg/metrics/errormetrics/errormetrics.go
index 008dd5fa03c..fc8ee911ffd 100644
--- a/pkg/metrics/errormetrics/errormetrics.go
+++ b/pkg/metrics/errormetrics/errormetrics.go
@@ -28,6 +28,8 @@ const (
 	HandlerError
 	// An event finalizer on Process failed
 	EventFinalizeProcessInfoFailed
+	// Failed to resolve Process uid to username
+	ProcessMetadataUsernameFailed
 )
 
 var errorTypeLabelValues = map[ErrorType]string{
@@ -38,6 +40,7 @@ var errorTypeLabelValues = map[ErrorType]string{
 	EventMissingProcessInfo:        "event_missing_process_info",
 	HandlerError:                   "handler_error",
 	EventFinalizeProcessInfoFailed: "event_finalize_process_info_failed",
+	ProcessMetadataUsernameFailed:  "process_metadata_username_failed",
 }
 
 func (e ErrorType) String() string {
diff --git a/pkg/sensors/exec/userinfo/userinfo.go b/pkg/sensors/exec/userinfo/userinfo.go
index 5a9c0c8bc11..e8680f323c9 100644
--- a/pkg/sensors/exec/userinfo/userinfo.go
+++ b/pkg/sensors/exec/userinfo/userinfo.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/cilium/tetragon/pkg/api/processapi"
 	"github.com/cilium/tetragon/pkg/grpc/exec"
+	"github.com/cilium/tetragon/pkg/metrics/errormetrics"
 	"github.com/cilium/tetragon/pkg/option"
 	"github.com/cilium/tetragon/pkg/reader/namespace"
 	"github.com/cilium/tetragon/pkg/reader/userdb"
@@ -37,6 +38,7 @@ func MsgToExecveAccountUnix(m *exec.MsgExecveEventUnix) error {
 	if option.Config.UsernameMetadata == int(option.USERNAME_METADATA_UNIX) {
 		username, err := getAccountUnix(m.Unix.Process.UID, &m.Unix.Msg.Namespaces)
 		if err != nil {
+			errormetrics.ErrorTotalInc(errormetrics.ProcessMetadataUsernameFailed)
 			return err
 		}