diff --git a/src/buffers.c b/src/buffers.c
index 3938fc3..c8681cf 100644
--- a/src/buffers.c
+++ b/src/buffers.c
@@ -54,7 +54,7 @@
 	buf->flags &= ~(BF_EMPTY|BF_FULL);
 	if (buf->l == 0)
 		buf->flags |= BF_EMPTY;
-	if (buf->l >= buf->rlim - buf->data)
+	if (buf->l >= buf->max_len)
 		buf->flags |= BF_FULL;
 
 	return -1;
@@ -88,7 +88,7 @@
 	buf->flags &= ~(BF_EMPTY|BF_FULL);
 	if (buf->l == 0)
 		buf->flags |= BF_EMPTY;
-	if (buf->l >= buf->rlim - buf->data)
+	if (buf->l >= buf->max_len)
 		buf->flags |= BF_FULL;
 
 	chunk->len = 0;
@@ -129,7 +129,7 @@
 	b->flags &= ~(BF_EMPTY|BF_FULL);
 	if (b->l == 0)
 		b->flags |= BF_EMPTY;
-	if (b->l >= b->rlim - b->data)
+	if (b->l >= b->max_len)
 		b->flags |= BF_FULL;
 
 	return delta;
@@ -170,7 +170,7 @@
 	b->flags &= ~(BF_EMPTY|BF_FULL);
 	if (b->l == 0)
 		b->flags |= BF_EMPTY;
-	if (b->l >= b->rlim - b->data)
+	if (b->l >= b->max_len)
 		b->flags |= BF_FULL;
 
 	return delta;
@@ -214,7 +214,7 @@
 	b->flags &= ~(BF_EMPTY|BF_FULL);
 	if (b->l == 0)
 		b->flags |= BF_EMPTY;
-	if (b->l >= b->rlim - b->data)
+	if (b->l >= b->max_len)
 		b->flags |= BF_FULL;
 
 	return delta;