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-rw-r--r--rfc2045.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/rfc2045.c b/rfc2045.c
index a0e5470..807a0c3 100644
--- a/rfc2045.c
+++ b/rfc2045.c
@@ -129,7 +129,7 @@ blaze822_multipart(struct message *msg, struct message **imsg)
 	if (!blaze822_mime_parameter(s, "boundary", &boundary, &boundaryend))
 		return 0;
 	char mboundary[256];
-	int boundarylen = boundaryend-boundary+2;
+	size_t boundarylen = boundaryend-boundary+2;
 
 	if (boundarylen >= 256)
 		return 0;