diff --git a/core/stream.c b/core/stream.c
index dee1ba3..87f3323 100644
--- a/core/stream.c
+++ b/core/stream.c
@@ -256,7 +256,7 @@ enum b_status b_stream_push_indent(b_stream *stream, int indent)
 		stream->s_istack_ptr = 0;
 	}
 
-	if (stream->s_istack_ptr + 1 > stream->s_istack_size) {
+	if (stream->s_istack_ptr + 1 >= stream->s_istack_size) {
 		int *buf = realloc(
 			stream->s_istack,
 			(stream->s_istack_size + 4) * sizeof(int));