diff --git a/pkg/fetcher/config/config.go b/pkg/fetcher/config/config.go
index 0562e56d..07c47cd6 100644
--- a/pkg/fetcher/config/config.go
+++ b/pkg/fetcher/config/config.go
@@ -301,7 +301,7 @@ func (cfg *Config) addFetcherToPodSpecWithCommand(podSpec *apiv1.PodSpec, mainCo
 		podSpec.Containers[ix] = container
 	}
 	if !found {
-		existingContainerNames := make([]string, len(podSpec.Containers))
+		existingContainerNames := make([]string, 0, len(podSpec.Containers))
 		for _, existingContainer := range podSpec.Containers {
 			existingContainerNames = append(existingContainerNames, existingContainer.Name)
 		}