diff --git a/cc/library_headers.go b/cc/library_headers.go
index 448e144..e5a5557 100644
--- a/cc/library_headers.go
+++ b/cc/library_headers.go
@@ -86,6 +86,10 @@
 		return
 	}
 
+	if !module.Properties.Bazel_module.Bp2build_available {
+		return
+	}
+
 	lib, ok := module.linker.(*libraryDecorator)
 	if !ok {
 		// Not a cc_library module
@@ -96,10 +100,6 @@
 		return
 	}
 
-	if !lib.Properties.Bazel_module.Bp2build_available {
-		return
-	}
-
 	// list of directories that will be added to the include path (using -I) for this
 	// module and any module that links against this module.
 	includeDirs := lib.flagExporter.Properties.Export_system_include_dirs