Index: ext/digest/bubblebabble/bubblebabble.c
===================================================================
--- ext/digest/bubblebabble/bubblebabble.c	(revision 22918)
+++ ext/digest/bubblebabble/bubblebabble.c	(working copy)
@@ -23,7 +23,7 @@
     size_t digest_len;
     VALUE str;
     char *p;
-    int i, j, seed = 1;
+    size_t i, j, seed = 1;
     static const char vowels[] = {
         'a', 'e', 'i', 'o', 'u', 'y'
     };
Index: ext/digest/digest.c
===================================================================
--- ext/digest/digest.c	(revision 22918)
+++ ext/digest/digest.c	(working copy)
@@ -36,7 +36,7 @@
 {
     char *digest;
     size_t digest_len;
-    int i;
+    size_t i;
     VALUE str;
     char *p;
     static const char hex[] = {