diff --git a/cmake/scripts/checkpatch.pl b/cmake/scripts/checkpatch.pl
index 4de3cc4..653b89f 100755
--- a/cmake/scripts/checkpatch.pl
+++ b/cmake/scripts/checkpatch.pl
@@ -720,7 +720,11 @@ sub seed_camelcase_includes {
 		$camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
 	} else {
 		my $last_mod_date = 0;
-		$files = `find $root/include -name "*.h"`;
+		if (!defined $root) {
+			$root = ".";
+		}
+
+		$files = `find $root/include -name "*.h" 2>/dev/null`;
 		@include_files = split('\n', $files);
 		foreach my $file (@include_files) {
 			my $date = POSIX::strftime("%Y%m%d%H%M",