diff --git a/usr.bin/grep/regex/tre-fastmatch.c b/usr.bin/grep/regex/tre-fastmatch.c
index b7a7c91..e363a28 100644
--- a/usr.bin/grep/regex/tre-fastmatch.c
+++ b/usr.bin/grep/regex/tre-fastmatch.c
@@ -101,9 +101,9 @@ static int	fastcmp(const fastmatch_t *fg, const void *data,
 
 #define IS_OUT_OF_BOUNDS						\
   ((!fg->reversed							\
-    ? ((type == STR_WIDE) ? ((j + fg->wlen) > len)			\
-			  : ((j + fg->len) > len))			\
-    : (j < 0)))
+    ? ((type == STR_WIDE) ? ((j + fg->wlen) >= len)			\
+			  : ((j + fg->len) >= len))			\
+    : (j <= 0)))
 
 /*
  * Checks whether the new position after shifting in the input string