1 files changed, 1 insertions, 1 deletions

diff --git a/src/search.c b/src/search.c
index ae36755a684..d3a5bd838a9 100644
--- a/src/search.c
+++ b/src/search.c
@@ -1709,7 +1709,7 @@ boyer_moore (n, base_pat, len, len_byte, trt, inverse_trt,
           if (ASCII_BYTE_P (*ptr) || ! multibyte)
             ch = *ptr;
           else if (charset_base
-                   && (pat_end - ptr) == 1 || CHAR_HEAD_P (ptr[1]))
+                   && ((pat_end - ptr) == 1 || CHAR_HEAD_P (ptr[1])))
             {
               unsigned char *charstart = ptr - 1;