diff --git a/python/mozbuild/mozbuild/mach_commands.py b/python/mozbuild/mozbuild/mach_commands.py
index 8827672dffb9..60710373e3b0 100644
--- a/python/mozbuild/mozbuild/mach_commands.py
+++ b/python/mozbuild/mozbuild/mach_commands.py
@@ -1648,7 +1648,7 @@ class StaticAnalysis(MachCommandBase):
     """Utilities for running C++ static analysis checks and format."""
 
     # List of file extension to consider (should start with dot)
-    _format_include_extensions = ('.cpp', '.c', '.h', '.java')
+    _format_include_extensions = ('.cpp', '.c', '.cc', '.h', '.java')
     # File contaning all paths to exclude from formatting
     _format_ignore_file = '.clang-format-ignore'