diff --git a/changelogs/fragments/interfaces_file-allow.yaml b/changelogs/fragments/interfaces_file-allow.yaml
new file mode 100644
index 00000000000..96326511773
--- /dev/null
+++ b/changelogs/fragments/interfaces_file-allow.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+- Fix interfaces_file to support `allow-` https://github.com/ansible/ansible/pull/37847
diff --git a/lib/ansible/modules/system/interfaces_file.py b/lib/ansible/modules/system/interfaces_file.py
index a6a5d91b52b..ef68aa89b36 100755
--- a/lib/ansible/modules/system/interfaces_file.py
+++ b/lib/ansible/modules/system/interfaces_file.py
@@ -225,7 +225,7 @@ def read_interfaces_lines(module, line_strings):
         elif words[0] == "auto":
             lines.append(lineDict(line))
             currently_processing = "NONE"
-        elif words[0] == "allow-":
+        elif words[0].startswith("allow-"):
             lines.append(lineDict(line))
             currently_processing = "NONE"
         elif words[0] == "no-auto-down":