diff --git a/payload_generator/deflate_utils.cc b/payload_generator/deflate_utils.cc
index 2449651..1bc3b36 100644
--- a/payload_generator/deflate_utils.cc
+++ b/payload_generator/deflate_utils.cc
@@ -256,9 +256,9 @@
   return true;
 }
 
-bool PreprocessParitionFiles(const PartitionConfig& part,
-                             vector<FilesystemInterface::File>* result_files,
-                             bool extract_deflates) {
+bool PreprocessPartitionFiles(const PartitionConfig& part,
+                              vector<FilesystemInterface::File>* result_files,
+                              bool extract_deflates) {
   // Get the file system files.
   vector<FilesystemInterface::File> tmp_files;
   part.fs_interface->GetFiles(&tmp_files);
diff --git a/payload_generator/deflate_utils.h b/payload_generator/deflate_utils.h
index 9b40a47..752bd9f 100644
--- a/payload_generator/deflate_utils.h
+++ b/payload_generator/deflate_utils.h
@@ -30,9 +30,9 @@
 // includes:
 //  - splitting large Squashfs containers into its smaller files.
 //  - extracting deflates in zip and gzip files.
-bool PreprocessParitionFiles(const PartitionConfig& part,
-                             std::vector<FilesystemInterface::File>* result,
-                             bool extract_deflates);
+bool PreprocessPartitionFiles(const PartitionConfig& part,
+                              std::vector<FilesystemInterface::File>* result,
+                              bool extract_deflates);
 
 // Spreads all extents in |over_extents| over |base_extents|. Here we assume the
 // |over_extents| are non-overlapping and sorted by their offset.
diff --git a/payload_generator/delta_diff_utils.cc b/payload_generator/delta_diff_utils.cc
index bd1c891..16a8ad5 100644
--- a/payload_generator/delta_diff_utils.cc
+++ b/payload_generator/delta_diff_utils.cc
@@ -403,7 +403,7 @@
   map<string, FilesystemInterface::File> old_files_map;
   if (old_part.fs_interface) {
     vector<FilesystemInterface::File> old_files;
-    TEST_AND_RETURN_FALSE(deflate_utils::PreprocessParitionFiles(
+    TEST_AND_RETURN_FALSE(deflate_utils::PreprocessPartitionFiles(
         old_part, &old_files, puffdiff_allowed));
     for (const FilesystemInterface::File& file : old_files)
       old_files_map[file.name] = file;
@@ -411,7 +411,7 @@
 
   TEST_AND_RETURN_FALSE(new_part.fs_interface);
   vector<FilesystemInterface::File> new_files;
-  TEST_AND_RETURN_FALSE(deflate_utils::PreprocessParitionFiles(
+  TEST_AND_RETURN_FALSE(deflate_utils::PreprocessPartitionFiles(
       new_part, &new_files, puffdiff_allowed));
 
   list<FileDeltaProcessor> file_delta_processors;