diff --git a/internal/data/object.go b/internal/data/object.go
index 2fd3e1f..f065b14 100644
--- a/internal/data/object.go
+++ b/internal/data/object.go
@@ -32,8 +32,10 @@ func (s SpriteHeader) Check(expectedSize uint32) error {
 
 	// TODO: WarHammer.ani sets Unknown1 to this for all 188,286 sprites. I am
 	// very interested in seeing if there are any others
-	if s.Unknown1[0] != 212 || s.Unknown1[1] != 113 || s.Unknown1[2] != 59 || s.Unknown1[3] != 1 {
-		log.Printf("Value of Unknown1 field: %v", s.Unknown1)
+	if s.Unknown1[0] | s.Unknown1[1] | s.Unknown1[2] | s.Unknown1[3] > 0 {
+		if s.Unknown1[0] != 212 || s.Unknown1[1] != 113 || s.Unknown1[2] != 59 || s.Unknown1[3] != 1 {
+			log.Printf("Value of Unknown1 field: %v", s.Unknown1)
+		}
 	}
 
 	// Remove 24 bytes from passed-in size to account for the header