Fixed segfault in yaml_string_write_handler.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/api.c b/src/api.c
index 0c4732e..b1a8da0 100644
--- a/src/api.c
+++ b/src/api.c
@@ -415,7 +415,7 @@ yaml_string_write_handler(void *data, unsigned char *buffer, size_t size)
 {
     yaml_emitter_t *emitter = data;
 
-    if (emitter->output.string.size + *emitter->output.string.size_written
+    if (emitter->output.string.size - *emitter->output.string.size_written
             < size) {
         memcpy(emitter->output.string.buffer
                 + *emitter->output.string.size_written,