diff --git a/libclamav/ole2_extract.c b/libclamav/ole2_extract.c
index 35bdc01e4c..e47781b614 100644
--- a/libclamav/ole2_extract.c
+++ b/libclamav/ole2_extract.c
@@ -794,6 +794,10 @@ static bool read_uint16(const uint8_t *const ptr, uint32_t ptr_size, uint32_t *i
     return true;
 }
 
+/* Search for the FILE_PASS number.  If I don't find it, the next two bytes are
+ * a length.  Consume that length of data, and try again.  Go until you either find
+ * the number or run out of data.
+ */
 static bool find_file_pass(const uint8_t *const ptr, uint32_t ptr_size, uint32_t *idx)
 {