1 files changed, 4 insertions, 1 deletions

diff --git a/src/search.c b/src/search.c
index e24a2019086..45d3f52fe90 100644
--- a/src/search.c
+++ b/src/search.c
@@ -822,7 +822,10 @@ search_buffer (string, pos, lim, n, RE, trt, inverse_trt)
          of pattern would align in a possible match.  */
       while (n != 0)
         {
-          if ((lim - pos - (direction > 0)) * direction < 0)
+          /* It's been reported that some (broken) compiler thinks that
+             Boolean expressions in an arithmetic context are unsigned.
+             Using an explicit ?1:0 prevents this.  */
+          if ((lim - pos - ((direction > 0) ? 1 : 0)) * direction < 0)
             return (n * (0 - direction));
           /* First we do the part we can by pointers (maybe nothing) */
           QUIT;