diff --git a/shared/build/docker/structs.go b/shared/build/docker/structs.go
index d30282f9c..0d3388999 100644
--- a/shared/build/docker/structs.go
+++ b/shared/build/docker/structs.go
@@ -133,7 +133,7 @@ type Config struct {
 	Dns             []string
 	Image           string // Name of the image as it was passed by the operator (eg. could be symbolic)
 	Volumes         map[string]struct{}
-	VolumesFrom     string
+	VolumesFrom     []string
 	WorkingDir      string
 	Entrypoint      []string
 	NetworkDisabled bool