diff --git a/android/vintf_data.go b/android/vintf_data.go
index 401f4d2..2909817 100644
--- a/android/vintf_data.go
+++ b/android/vintf_data.go
@@ -140,6 +140,7 @@
 
 	// Process vintf fragment source file with assemble_vintf tool
 	builder.Command().
+		Implicits(inputPaths).
 		Flags(assembleVintfEnvs).
 		BuiltTool("assemble_vintf").
 		FlagWithArg("-i ", strings.Join(inputPaths.Strings(), ":")).