diff --git a/python/mozbuild/mozbuild/backend/recursivemake.py b/python/mozbuild/mozbuild/backend/recursivemake.py
index cd55eb67d87e4..f645344468497 100644
--- a/python/mozbuild/mozbuild/backend/recursivemake.py
+++ b/python/mozbuild/mozbuild/backend/recursivemake.py
@@ -457,7 +457,7 @@ def consume_object(self, obj):
             }
             variables = [suffix_map[obj.canonical_suffix]]
             if isinstance(obj, GeneratedSources):
-            	variables.append('GARBAGE')
+                variables.append('GARBAGE')
                 base = backend_file.objdir
                 cls = ObjDirPath
                 prefix = '!'
@@ -482,7 +482,7 @@ def consume_object(self, obj):
             }
             variables = [suffix_map[obj.canonical_suffix]]
             if isinstance(obj, HostGeneratedSources):
-            	variables.append('GARBAGE')
+                variables.append('GARBAGE')
                 base = backend_file.objdir
                 cls = ObjDirPath
                 prefix = '!'
@@ -506,7 +506,7 @@ def consume_object(self, obj):
             }
             variables = [suffix_map[obj.canonical_suffix]]
             if isinstance(obj, WasmGeneratedSources):
-            	variables.append('GARBAGE')
+                variables.append('GARBAGE')
                 base = backend_file.objdir
                 cls = ObjDirPath
                 prefix = '!'