diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c
index e78ee40d74..ed065b0a93 100644
--- a/util/cbfstool/cbfs_image.c
+++ b/util/cbfstool/cbfs_image.c
@@ -112,7 +112,7 @@ int cbfs_parse_comp_algo(const char *name)
 
 /* CBFS image */
 
-static size_t cbfs_calculate_file_header_size(const char *name)
+size_t cbfs_calculate_file_header_size(const char *name)
 {
 	return (sizeof(struct cbfs_file) +
 		align_up(strlen(name) + 1, CBFS_FILENAME_ALIGN));
diff --git a/util/cbfstool/cbfs_image.h b/util/cbfstool/cbfs_image.h
index 907be613d0..ecd7db7028 100644
--- a/util/cbfstool/cbfs_image.h
+++ b/util/cbfstool/cbfs_image.h
@@ -164,4 +164,6 @@ int cbfs_print_entry_info(struct cbfs_image *image, struct cbfs_file *entry,
 int cbfs_merge_empty_entry(struct cbfs_image *image, struct cbfs_file *entry,
 			   void *arg);
 
+/* Returns the size of a cbfs file header with no extensions */
+size_t cbfs_calculate_file_header_size(const char *name);
 #endif