diff --git a/src/common/unzip/unzip.c b/src/common/unzip/unzip.c
index 17d730d6..ce366d00 100644
--- a/src/common/unzip/unzip.c
+++ b/src/common/unzip/unzip.c
@@ -1291,7 +1291,7 @@ extern int ZEXPORT unzReadCurrentFile  (file, buf, len)
         return UNZ_PARAMERROR;
 
 
-    if ((pfile_in_zip_read_info->read_buffer == NULL))
+    if (pfile_in_zip_read_info->read_buffer == NULL)
         return UNZ_END_OF_LIST_OF_FILE;
     if (len==0)
         return 0;