diff --git a/apex/apex.go b/apex/apex.go
index fbf6a6f..e3edc68 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -1152,9 +1152,10 @@
 
 const (
 	// File extensions of an APEX for different packaging methods
-	imageApexSuffix = ".apex"
-	zipApexSuffix   = ".zipapex"
-	flattenedSuffix = ".flattened"
+	imageApexSuffix  = ".apex"
+	imageCapexSuffix = ".capex"
+	zipApexSuffix    = ".zipapex"
+	flattenedSuffix  = ".flattened"
 
 	// variant names each of which is for a packaging method
 	imageApexType     = "image"