diff --git a/fact_helper_file/mime/custom_mime_archives b/fact_helper_file/mime/custom_mime_archives
index 16c3762..96d9499 100644
--- a/fact_helper_file/mime/custom_mime_archives
+++ b/fact_helper_file/mime/custom_mime_archives
@@ -139,7 +139,9 @@
 !:mime	application/x-shar
 
 # ar archive
-0	string		=!<arch>\n		current ar archive
+# we don't want to match .deb archives here and negative lookahead is not allowed
+# this should be equivalent to '!<arch>\n(?!deb)'
+0   regex   =!<arch>\n([^d]..|.[^e].|..[^b]|$)  current ar archive
 !:mime	application/x-archive
-0	string		=<ar>		System V Release 1 ar archive
+0   string  =<ar>		System V Release 1 ar archive
 !:mime	application/x-archive
diff --git a/pyproject.toml b/pyproject.toml
index 0f47cbf..5adc8b6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "fact_helper_file"
-version = "0.2.15"
+version = "0.2.16"
 authors = [
     {name = "Johannes vom Dorp"}
 ]