1 files changed, 2 insertions, 2 deletions
diff --git a/re.c b/re.c
index ceb72b9377..c78d57858a 100644
--- a/re.c
+++ b/re.c
@@ -229,7 +229,7 @@ rb_memsearch_wchar(const unsigned char *xs, long m, const unsigned char *ys, lon
     const unsigned char *x = xs, x0 = *xs, *y = ys;
     enum {char_size = 2};
 
-    for (n -= m; n > 0; n -= char_size, y += char_size) {
+    for (n -= m; n >= 0; n -= char_size, y += char_size) {
 	if (x0 == *y && memcmp(x+1, y+1, m-1) == 0)
 	    return y - ys;
     }
@@ -242,7 +242,7 @@ rb_memsearch_qchar(const unsigned char *xs, long m, const unsigned char *ys, lon
     const unsigned char *x = xs, x0 = *xs, *y = ys;
     enum {char_size = 4};
 
-    for (n -= m; n > 0; n -= char_size, y += char_size) {
+    for (n -= m; n >= 0; n -= char_size, y += char_size) {
 	if (x0 == *y && memcmp(x+1, y+1, m-1) == 0)
 	    return y - ys;
     }