diff --git a/include/http_protocol.h b/include/http_protocol.h
index e1572dc..8ed77ac 100644
--- a/include/http_protocol.h
+++ b/include/http_protocol.h
@@ -439,7 +439,27 @@ AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r);
  */
 static APR_INLINE int ap_rputs(const char *str, request_rec *r)
 {
-    return ap_rwrite(str, (int)strlen(str), r);
+    apr_size_t len;
+
+    len = strlen(str);
+
+    for (;;) {
+        if (len <= INT_MAX) {
+            return ap_rwrite(str, (int)len, r);
+        }
+        else {
+            int rc;
+
+            rc = ap_rwrite(str, INT_MAX, r);
+            if (rc < 0) {
+                return rc;
+            }
+            else {
+                str += INT_MAX;
+                len -= INT_MAX;
+            }
+        }
+    }
 }
 
 /**
diff --git a/server/protocol.c b/server/protocol.c
index a554970..ea461a2 100644
--- a/server/protocol.c
+++ b/server/protocol.c
@@ -2107,6 +2107,9 @@ AP_DECLARE(int) ap_rputc(int c, request_rec *r)
 
 AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r)
 {
+    if (nbyte < 0)
+        return -1;
+
     if (r->connection->aborted)
         return -1;